2018届高三高考模拟考试试卷2

2018届东北三省四市高三高考第二次模拟考试理科综合物理试卷SYS201806270701一、选择题详细信息1. 难度：简单下列说法正确的是A. 太阳辐射的能量主要来自太阳内部的核裂变反应B. 黑体辐射的实验规律可用光的波动性解释C. 一束光照到某金属上，不能发生光电效应，是因为该束光的频率低于极限频率D. 氢原子从较低能级跃迁到较高能级时，棱外电子的动能增大，势能减小SYS20180627070详细信息2. 难度：中等比邻星是离太阳系最近（距离太阳4.2光年）的一颗恒星。

据报道：2016年天文学家在比邻星的宜居带发现了一颗岩石行星——比邻星b，理论上在它的表面可以维持水的存在，甚至有可能拥有大气层。

若比邻星b绕比邻星的公转半径是地球绕太阳的公转半径的p倍，比邻星b绕比邻星的公转周期是地球绕太阳的公转周期的a倍，则比邻星与太阳的质量的比值为A. B. C. D.SYS20180627070详细信息3. 难度：简单一物体沿直线运动，用x表示运动位移，用t表示运动时间。

从t=0时刻开始计时，物体与r的图象如图所示，图线斜率的绝对值为k，则以下说法正确的是A. 物体做匀速直线运动，速度大小等于kB. 物体做变减速直线运动，加速度均匀减小C. 物体做匀减速直线运动，加速度大小等于kD. 物体做匀减速直线运动，加速度大小等于2kSYS20180627070详细信息4. 难度：中等如图所示，一个理想变压器原线圈的匝数为50匝，副线圈的匝数为100匝，原线圈两端接在光滑的水平平行导轨上，导轨间距为0.4m。

导轨上垂直于导轨有一长度略大于导轨间距的导体棒，导轨与导体棒的电阻忽略不计，副线圈回路中电阻R1=5Ω，R2=15Ω．图中交流电压表为理想电压表。

导轨所在空间有垂直于导轨平面、磁感应强度大小为1T的匀强磁场。

导体棒在水平外力的作用下运动，其速度随时间变化的关系式为：，则下列说法中正确的是A. R1的功率为0.2 WB. 电压表的示数为C. 水平外力为恒力D. 变压器铁芯中磁通量变化率的最大值为0.04 Wb/sSYS201806270702二、不定项选择题详细信息5. 难度：中等如图所示，真空中有一边长为a的等边三角形ABC，P点是三角形的中心。

黄浦区2018年高考模拟考数学试卷(完卷时间：120分钟 满分：150分) 2018.4考生注意：1．每位考生应同时收到试卷和答题卷两份材料，解答必须在答题卷上进行，写在试卷上的解答一律无效； 2．答卷前，考生务必将姓名等相关信息在答题卷上填写清楚，并在规定的区域贴上条形码； 3．本试卷共21道试题，满分150分；考试时间120分钟．一、填空题（本大题共有12题，满分54分）考生应在答题纸相应编号的空格内直接填写结果，每个空格填对前6题得4分、后6题得5分，否则一律得零分.1．已知集合{}{}1,2,31,A B m ==，，若3m A -∈，则非零实数m 的数值是 ． 2．不等式|1|1x ->的解集是 ．3．若函数()f x 是偶函数，则该函数的定义域是 ．4．已知ABC ∆的三内角A B C 、、所对的边长分别为a b c 、、，若2222sin a b c bc A =+-，则内角A 的大小是 ．5．已知向量a 在向量b 方向上的投影为2-，且3b =，则a b ⋅= ．(结果用数值表示)6．方程33log (325)log (41)0x x⋅+-+=的解x = ．7．已知函数2sin cos 2()1cos x x f x x-=，则函数()f x 的单调递增区间是 ．8．已知α是实系数一元二次方程22(21)10x m x m --++=的一个虚数根，且||2α≤，则实数m 的取值范围是 ．9．已知某市A 社区35岁至45岁的居民有450人，46岁至55岁的居民有750人，56岁至65岁的居民有900人．为了解该社区35岁至65岁居民的身体健康状况，社区负责人采用分层抽样技术抽取若干人进行体检调查，若从46岁至55岁的居民中随机抽取了50人，试问这次抽样调查抽取的人数是 人． 10．将一枚质地均匀的硬币连续抛掷5次，则恰好有3次出现正面向上的概率是 ．(结果用数值表示) 11．已知数列{}n a 是共有k 个项的有限数列，且满足11(2,,1)n n nna a n k a +-=-=-，若1224,51,0k a a a ===，则k = ．12．已知函数2()(02)f x ax bx c a b =++<<对任意R x ∈恒有()0f x ≥成立，则代数式(1)(0)(1)f f f --的最小值是 ．二、选择题（本大题满分20分）本大题共有4题，每题有且只有一个正确答案，考生应在答题卷的相应编号上，将代表答案的小方格涂黑，选对得5分，否则一律得零分．13．在空间中，“直线m ⊥平面α”是“直线m 与平面α内无穷多条直线都垂直 ”的答( )．(A )充分非必要条件 (B )必要非充分条件 (C )充要条件 (D )非充分非必要条件14．二项式40的展开式中，其中是有理项的项数共有 答( ). (A ) 4项 (B ) 7项 (C ) 5项 (D ) 6项15．实数x y 、满足线性约束条件3,0,0,10,x y x y x y +≤⎧⎪≥≥⎨⎪-+≥⎩则目标函数23w x y =+-的最大值是答( )．(A ) 0 (B ) 1 (C ) 2- (D ) 316．在给出的下列命题中，是假命题的是 答( )． (A )设O A B C 、、、是同一平面上的四个不同的点，若(1)(R)OA m OB m OC m =⋅+-⋅∈， 则点A B C 、、必共线(B )若向量a b 和是平面α上的两个不平行的向量，则平面α上的任一向量c 都可以表示为(R)c a b λμμλ=+∈、，且表示方法是唯一的(C )已知平面向量OA OB OC 、、满足||||(0)OA OB OC r r ==>|=|，且0OA OB OC ++=， 则ABC ∆是等边三角形(D )在平面α上的所有向量中，不存在这样的四个互不相等的非零向量a b c d 、、、，使得其 中任意两个向量的和向量与余下两个向量的和向量相互垂直三、解答题（本大题满分76分）本大题共有5题，解答下列各题必须在答题卷的相应编号规定区域内写出必要的步骤．17.（本题满分14分）本题共有2个小题，第1小题满分4分，第2小题满分10分． 在四棱锥P A B -中，P A A B ⊥平面，,,1,AB AD BC AD BC ⊥=045CD CDA =∠=．(1)画出四棱锥P ABCD -的主视图；(2)若PA BC =，求直线PB 与平面PCD 所成角的大小．(结果用反三角函数值表示)18.（本题满分14分）本题共有2个小题，第1小题满分6分，第2小题满分8分．某企业欲做一个介绍企业发展史的铭牌，铭牌的截面形状是如图所示的扇形环面(由扇形OAD 挖去扇形OBC 后构成的)．已知10,(010)OA OB x x ==<<米米，线段BA CD 、线段与弧BC 、弧AD 的长度之和为30米，圆心角为θ弧度． (1)求θ关于x 的函数解析式；(2)记铭牌的截面面积为y ，试问x 取何值时，y 的值最大？并求出最大值．19.（本题满分14分）本题共有2个小题，第1小题满分6分，第2小题满分8分．已知动点(,)M x y 到点(2,0)F 的距离为1d ，动点(,)M x y 到直线3x =的距离为2d，且12d d =. (1)求动点(,)M x y 的轨迹C 的方程； (2)过点F 作直线:(2)(0)l y k x k =-≠交曲线C 于P Q 、两点，若OPQ ∆的面积OPQ S ∆(O 是坐标系原点)，求直线l 的方程.20.（本题满分16分）本题共有2个小题，第1小题满分4分，第2小题满分6分，第3小题满分6分．已知函数22, 10,()=1, 0 1.x x f x x x --≤<⎧⎨-≤≤⎩(1) 求函数()f x 的反函数1()fx -；(2)试问:函数()f x 的图像上是否存在关于坐标原点对称的点，若存在，求出这些点的坐标；若不存在，说明理由； (3)若方程()|()240f x f x ax +---=的三个实数根123x x x 、、满足:123x x x <<，且32212()x x x x -=-，求实数a 的值．21.（本题满分18分）本题共有3个小题，第1小题满分3分，第2小题满分6分，第3小题满分9分． 定义：若数列{}n c 和{}n d满足*10,0,N nn n c d n +>>=∈且c ，则称数列{}n d 是数列{}n c 的“伴随数列”.已知数列{}n b 是数列{}n a 的伴随数列，试解答下列问题： (1)若*(N )nn b a n =∈，1b {}n a 的通项公式n a ；(2)若*11(N )n n n b b n a +=+∈，11b a 为常数，求证：数列2n n b a ⎧⎫⎛⎫⎪⎪⎨⎬ ⎪⎝⎭⎪⎪⎩⎭是等差数列； (3)若*1N )n nb n +=∈，数列{}n a 是等比数列，求11a b 、的数值．黄浦区2018年高考模拟考数学试卷参考答案和评分标准2018.4说明：1．本解答仅列出试题的一种解法，如果考生的解法与所列解答不同，可参考解答中的评分精神进行评分．2．评阅试卷，应坚持每题评阅到底，不要因为考生的解答中出现错误而中断对该题的评阅，当考生的解答在某一步出现错误，影响了后继部分，但该步以后的解答未改变这一题的内容和难度时，可视影响程度决定后面部分的给分，这时原则上不应超过后面部分应给分数之半，如果有较严重的概念性错误，就不给分． 一、填空题. 1．2 2．(,0)(2,)-∞+∞ 3．[2,2]- 4．4π5．6- 6．27．3[,],Z 88k k k ππππ-+∈ 8．3(4- 9．140 10．51611．50 12．3.二、选择题．13．()A 14．()B 15．()D 16．()D三、解答题． 17．（本题满分14分）本题共有2个小题，第1小题满分4分，第2小题满分10分． 解 (1)主视图如下：(2) 根据题意，可算得1,2AB AD ==. 又1PA BC ==，按如图所示建立空间直角坐标系， 可得，(0,0,0),(1,0,0),(1,1,0),(0,2,0),(0,0,1)A B C D P . 于是，有(1,0,1),(1,1,0),(0,2,1)PB CD PD =-=-=- . 设平面PCD 的法向量为(,,)n x y z =，则0,0,n CD n PD ⎧⋅=⎪⎨⋅=⎪⎩即0,20.x y y z -+=⎧⎨-=⎩令2z =，可得1,1y x ==，故平面PCD 的一个法向量为(1,1,2)n =.设直线PB 与平面PCD 所成角的大小为θ，则||3sin 6||||n PB n PB θ⋅==. 所以直线PB 与平面PCD 所成角的大小为arcsin 6.18．（本题满分14分）本题共有2个小题，第1小题满分6分，第2小题满分8分． 解 (1)根据题意，可算得弧BC x θ=⋅(m )，弧10AD θ=(m ). 又30BA CD BC CD +++=弧弧，于是，10101030x x x θθ-+-+⋅+=，所以，210(010)10x x x θ+=<<+.(2) 依据题意，可知22111022OAD OBC y S S x θθ=-=⨯-扇扇化简，得2550yx x =-++25225()24x =--+. 于是，当52x =(满足条件010x <<)时，max 2254y =(2m ).答 所以当52x =米时铭牌的面积最大，且最大面积为2254平方米.19． （本题满分14分）本题共有2个小题，第1小题满分6分，第2小题满分8分． 解 (1)结合题意，可得12|3|d d x ==-.又12d d =3=，化简得 22162x y +=. 因此，所求动点(,)M x y 的轨迹C 的方程是22162x y +=. (2) 联立方程组221,62(2),x y y k x ⎧+=⎪⎨⎪=-⎩得2222(13)121260k x k x k +-+-=.设点1122(,)(,)P x y Q x y 、，则2122212212,13126,130.k x x k k x x k ⎧+=⎪+⎪-⎪=⎨+⎪∆>⎪⎪⎩于是，弦||PQ == 点O 到直线l的距离d =.由OPQS ∆== 42210k k -+=，解得1k =±，且满足0∆>，即1k =±都符合题意. 因此，所求直线的方程为2020x y x y --=+-=或.20．（本题满分16分）本题共有3个小题，第1小题满分4分，第2小题满分6分，第3小题满分6分． 解 (1)22, 10,()=1, 0 1.x x f x x x --≤<⎧⎨-≤≤⎩∴当10x -≤<时，()2,0()2f x x f x =-<≤且.由2y x =-，得12x y =-，互换x y 与，可得11()(02)2f x x x -=-<≤. 当01x ≤≤时，2()1,()0f x x f x =-≤≤且-1.由21y x =-，得x =x y 与，可得1()10)f x x -=-≤≤.11, 0<2,2() 10.x x f x x -⎧-≤⎪∴=-≤≤(2) 答 函数图像上存在两点关于原点对称.设点00000(,)(01)(,)A x y x B x y <≤--、是函数图像上关于原点对称的点，则00()()0f x f x +-=，即200120x x -+=，解得001(1,)x x ==舍去，且满足01x <≤ .因此，函数图像上存在点1,2(12)A B -和关于原点对称.(3) 考察函数()y f x =与函数y =当12x -≤≤-时，有()f x ≥4240x ax ---=，解得 2+2x a =-，且由21+22a -≤-≤-，得02a ≤≤.当1x <≤时，有()f x <240ax -=，化简得 22(4)40a x ax ++=，解得24=0+4a x x a =-，或(当02a ≤≤时，24024aa -<-<+). 于是，123224,,024ax x x a a =-=-=++. 由32212()x x x x -=-，得22442=2(+)+442a a a a a -++，解得32a -±=.因为312a -=<-，故32a --=不符合题意，舍去；02a <=<，满足条件.因此，所求实数a =21．（本题满分18分）本题共有3个小题，第1小题满分3分，第2小题满分6分，第3小题满分9分． 解 (1)根据题意，有*10,0,N n n n a b a n +>>=∈且.由*(N )nn b a n =∈，1b =111n a a b +====*N n ∈.所以n a =，*N n ∈． 证明 (2)*11(N )n n n b b n a +=+∈，*10,0,N n n n a b a n +>>=∈且，∴11nn b a ++==11n n b a ++=*N n ∈．∴22111n n n n b b a a ++⎛⎫⎛⎫-= ⎪ ⎪⎝⎭⎝⎭，*N n ∈．∴数列2n n b a ⎧⎫⎛⎫⎪⎪⎨⎬ ⎪⎝⎭⎪⎪⎩⎭是首项为211b a ⎛⎫ ⎪⎝⎭、公差为1的等差数列．解(3)*1N )n n b n +=∈，*10,0,N n n n a b a n +>>=∈且，*N n n a b n <+≤∈，得11n a +<.{}n a 是等比数列，且0n a >，设公比为(0)r r >，则1*1(N )n n a a r n -=∈.∴当1r >，即lim n n a →∞→+∞，与11n a +<≤矛盾．因此，1r >不成立. 当01r <<，即lim 0n n a →∞→，与11n a +<01r <<不成立.∴1r =，即数列{}n a 是常数列，于是，1n a a =(11a <≤).*11(N )n n b n +∴=∈. 100n b b >∴>，，数列{}n b 也是等比数列，设公比为(0)q q >，有11n n b b q +=.2n a +∴=可化为222221111111(1)2(1)0(1n n b a q a b q a a a --+-=<≤，*N n ∈.2222422111111111(1)0,20,(1)0,4(2)0b a a b a a a b a ->≠->∆=-≥，∴关于x 的一元二次方程22222111111(1)2(1)0b a x a b x a a --+-=有且仅有两个非负实数根.一方面，n q (*N n ∈)是方程22222111111(1)2(1)0b a x a b x a a --+-=的根；另一方面，若1(0)q q ≠>，则无穷多个互不相等的234,,,,,,n q q q q q 都是该二次方程的根.这与该二次方程有且仅有两个非负实数根矛盾！1q ∴=，即数列{}n b 也是常数列，于是，1n b b =，*N n ∈.∴由*1N )n nb n +=∈，得1a =把1a =1n a +=解得1b11a b ⎧=⎪∴⎨=⎪⎩ ．。

广东省化州市2018年高考第二次模拟考试语文试题化州市2018年高考第二次模拟语文试题参考答案一、现代文阅读（35 分）（一）论述类文本阅读（本题共3小题，9 分）1. C（C 选项中的“人们平常表现出的彬彬有礼其实是端架子、装腔作势的假象”和原文中“在一个公开的场合”这一信息是存在出入的。

选项有意模糊了其范围和程度，从而存在错误。

）2. A（A 选项中的因果关系不当。

王国维的评价中并没有指出，词“要眇宜修”的特点对其境界的限制，只是客观地表述诗和词的不同特点。

3. A（A 选项中“诗人文士主观上并不想要把思想志意完全容纳进去”，意思是诗人文士仍然是希望把思想志意部分地融入，这一判断显然存在问题。

）（二）文学类文本阅读（本题共3小题，14 分）4．C（A 项“自豪”是“我”当时的真实心理感受，并非反语。

B 项儿媳的看法不完全是偏见。

D 项“情节跌宕起伏”“始终在轻快而诙谐的笔调中发展”与原文不符，“如一只优美婉转的小夜曲”也评价不当，“随想曲”与“小夜曲”是两种不同曲风，本文叙述平静、自然，更近）似“随想曲”。

“静谧、清新”1 分，结（2 分，5．（1）特点：新月迷蒙，柔柳低拂，营造出静谧、清新的氛围。

合原文分析1分。

意思相近即可）（2）作用：扣题，交代故事发生的背景——乡下月夜（环境方面）；引出下文，为组长赞美乡下空气作铺垫（情节上）；景中寓情，烘托出“我”有幸陪组长坐在小河边时的喜悦之情（2 分，每答出1点给1分）。

（人物）（1）第一次听组长赞美乡下的自然条件时，充满自豪，满怀邀请组长孙女下乡玩的热情。

6．“我”的热情（2）听组长担心乡下卫生条件却又忧虑孙女不能像乡下人那样吃上新鲜东西时，冷却。

“我”进而想到自己和组长的巨大差距，感到失落，心生怨气。

（3）“我”感到悲凉。

（答出1 点（4）组长对“我”进行“传统教育”并对“我”的埋怨毫不理解时，给1分，答出2点得3分，答出3点给5分。

如有其他答案，只要言之成理，也可给分）（三）实用类文本阅读（本题共3小题，12 分）“首次对变味的‘收视率’开战”错误，原文是“首次明确将《美人私房菜》收视不佳7.A（归结为‘制作方没有购买收视数据……’”。

广东省化州市2018年高考第二次模拟考试语文试题一、现代文阅读（35分）（一）论述类文本阅读（本题共3小题，9分）阅读下面的文字，完成1-3题。

词之所以微妙是什么缘故呢？因为词在初起的时候，本来就是那些个诗人文士写给美丽的歌女去唱歌的歌词，没有想把我的思想怀抱理想志意都写到词里边去。

他最初本来没有这种用心，没有这种想法。

写美丽女子的爱情，就是写美丽女子的爱情。

可是，奇妙的事情就是在这里发生的。

每一个人都是带着自己的思想文化教养性格的种种不同的背景的，不管你是欣赏诗歌，还是创作诗歌，都无法避免，你就是你，你无论是解说，无论是创作，都带着自己的背景在其中了。

微妙的事情发生在哪里呢？就是在这些个诗人文士，当他用游戏笔墨为了娱宾遣兴给歌女写歌词的时候，无法避免地把自己的性格思想，在不知不觉之中，隐意识的，自己完全都不知道的，流露表现在爱情的歌词中去了。

这是很微妙的一件事情。

而且，我们有一句俗话说，观人于揖让，不若观人于游戏。

我们要观察一个人，看他揖让进退，他在一个公开的场合，表现得彬彬有礼——当然，因为那是要给大家看的。

可是，当他游戏的时候，因为不用端着架子，不用装腔作态了，所以，不知不觉反而把他更真的自我表现出来了。

词就是有这样一种微妙的作用。

就是说他本来没有要写自己理想志意的用心，只是给美丽的歌女，写一些漂亮的爱情的歌词。

可是他不知不觉地就把他最深隐的本质，这不是拿腔作调说出来的什么伦理道德，而是他自己真正的感情人格的最基本的本质，无意之中，不注意之间就流露表现出来了。

词既有这样一种微妙的作用，因此，王国维在他的《人间词话》里，就为词的性质下了这样几句定义，他说：“词之为体，要眇宜修，能言诗之所不能言，而不能尽言诗之所能言。

诗之境阔，词之言长。

”他说词这种文学体式是“要眇宜修”。

“要眇宜修”出于《楚辞·九歌·湘君》“美要眇兮宜修”，是写湘水上的一个神灵具有一种要眇宜修的美。

这是一种什么样的美呢？《楚辞》有王逸的注解《楚辞章句》，说“要眇”是“好貌”，是一种美好的样子。

青霄有路终须到，金榜无名誓不还！
2018-2019年高考备考
广西南宁市2018届第二次模拟考试
文科数学
一、选择题：本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中，只有一项是符合题目要求的.
1.已知集合{}|8U x x =≤，集合{}
2|80A x x x =-≤，则U C A =（ ） A ．(),8-∞ B ．(],0-∞ C ．(),0-∞ D ．∅
2.下列命题正确的是（ ）
A ．命题“若αβ=，则sin sin αβ=”的逆否命题为真命题
B ．命题“若a b <，则22
ac bc ≤”的逆命题为真命题
C ．命题“0,50x x ∀>>”的否定是“000,50x x ∃≤≤”
D ．“1x <-”是“()ln 20x +<”的充分不必要条件 3.已知tan 3α=，则
sin 21cos 2αα
=+（ ） A ．-3 B ．13- C ．13 D ．3 4.已知向量b 在向量a 方向上的投影为2，且1a =，则a b = （ ）
A ．-2
B ．-1 C. 1 D ．2
5.若点P 为圆22
1x y +=上的一个动点，点()()1,0,1,0A B -为两个定点，则PA PB +的最大值是 （ ）
A ．2
B ．22 C. 4 D ．42
6.《九章算术》中对一些特殊的几何体有特定的称谓，例如：将底面为直角三角形的直三棱柱称为堑堵.将一堑堵沿其一顶点与相对的棱刨开，得到一个阳马（底面是长方形，且有一条侧棱与底面垂直的四棱锥）和一个鳖臑（四个面均匀直角三角形的四面体）.在如图所示的堑堵111ABC A B C -中，。

【做答案】2018年广东省高考英语听说模拟考试题2PART A Reading AloudFish are masters of the waters. And sailfish are the fastest of them all. Their speed makes them one of the ocean’s most fearsome predators. Off the coast of Mexico, 30 sailfish have surrounded a ball of sardines. To catch their prey requires more than speed alone. In the tightest turns, fins maintain stability. Their sickle-shaped tail powers them forwards, and that extraordinary dorsal fin helps intimidate their prey. To the naked eye, the action is too fast, slowed, their challenge becomes clear. Just picking a target is hard enough.PART B Role Play角色：你是辅导员。

任务：（1）和你所辅导的学生讨论有关考试的话题；（2）根据谈话内容回答其他同学的提问。

生词：counselor 顾问cram 死记硬背hastily 仓促地录像原文：M: You look better today, Mandy. How did your test go?W: Much better than the did yesterday.M: Did you pass?W: I not only passed my test, but I did quite well. I’m so happy.M: You should be. You worked really hard last night preparing for it.W: Thanks for helping me with it, Vincent. If you hadn’t pushed me to do my best, I wouldn’t able to pass.M: You don’t have to thank me. It’s just a part of my job, I’m your counselor. Well, when are your final exams?W:I find my finals in two months.下面请你用英语提出三个问题。

房山区2018年高考第二次模拟测试试卷数学（文）本试卷共5页，150分。

考试时长120分钟。

考生务必将答案答在答题纸上，在试卷上作答无效。

考试结束后，将本试卷和答题纸一并交回。

第一部分 （选择题 共40分）一、选择题共8小题，每小题5分，共40分。

在每小题列出的四个选项中，选出符合题目要求的一项。

（1）设集合{|2},{|03}A x x B x x =≤=<<，则AB =（A ）{}2≤x x （B ） {|3}x x < （C ）{|23}x x << （D ）{|23}x x ≤< （2）设复数 iz 1i =-+，则复数z 在复平面内对应的点位于（A ）第一象限 （B ）第二象限 （C ）第三象限 （D ）第四象限 （3）下列函数中，在区间(2,)+∞上为增函数的是（A ）3xy =- （B ）12y x =- （C ） 2(2)y x =-- （D ）12log y x = （4）已知实数,x y 满足10,0,0,+-≥⎧⎪≥⎨⎪≥⎩x y x y的取值范围是（A ）()01， （B ）(]01， （C ）[)1+∞， （D）+⎫∞⎪⎪⎭（5）将函数sin y x =的图象上所有点的横坐标扩大到原来的2倍，纵坐标不变，再把所得的图象上的所有点向右平移2个单位长度，得到的图象所对应的函数解析式为(A)sin(22)=-y x (B) sin(22)=+y x (C) 1sin(1)2=+y x (D) 1sin(1)2=-y x （6）已知某几何体的三视图如图所示，则该几何体的最长棱为俯视图左视图（A ）4 （B ）22 （C ）7 （D ）2（7）12+>“”x x是1>“”x 的 （A ）充要条件 （B ）充分而不必要条件 （C ）必要而不充分条件 （D ）既不充分也不必要条件（8）正方形ABCD 的边长为1，点E 在边AB 上，点F 在边BC 上，11,24AE BF ==．动点P 从E 出发沿直线向F 运动，每当碰到正方形的边时反弹，反弹时反射角等于入射角，当点P 第一次碰到E 时，P与正方形的边碰撞的次数为（A ）3 （B ）4 （C ）6 （D ）8第一部分（非选择题 共110分）二、填空题共6小题，每小题5分，共30分。

黄浦区2017 学年度第二学期期终教学质量监控测试高三英语试卷2018.04考生注意：1. 考试时间120 分钟，试卷满分140 分。

2. 本考试设试卷和答题纸两部分。

所有答題必须涂（选择题）或写（非选择题）在答题纸上，做在试卷上一律不得分。

3. 答題前，务必在答題纸上填写准考证号和姓名，并将核对后的条形码貼在指定位置上，在答題纸反面清楚地填写姓名。

第I 卷( 共100 分)I. Listening Comprehension Section ADirections: In Section A, you will hear ten short conversations between two speakers. At the endof each conversation, a question will be asked about what was said. The conversations and the questions will be spoken only once. After you hear a conversation and the question about it, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard.1. A. In a fruit store B. In a gym C. At a restaurant D. At a watch shop2. A. 4:30 B. 5:00 C. 5:10 D. 5:153. A. Boss and secretary B. Nurse and patientC. Salesman and customerD. Teacher and student4. A. The tickets are more expensive B. The tickets told online are cheaperC. It is difficult to get tickets on the spotD. It ‘ s better to buy tickoefftlsi ne5. A. He wants to be a musician in the futureB. He shows more interest in English learningC. He displays great music talent in the exhibitionD. He doesn ‘ t make enough efforts in English learning6. A. He wants to get some sleep B. He needs time to write a paperC. He has a literature class to attendD. He is troubled by his sleep problem7. A. It looks old B. It looks newC. It doesn ‘ t need paintingD. It doesn ‘ t run well8. A. Extremely dull B. Hard to understandC. Lacking a good storyD. Not worth seeing twice9. A. Plan his budget carefully B. Buy a gift for his motherC. Ask someone else for adviceD. Give her more information10. A. She didn ‘ t like telling jokes B. She went to school after 9 a.m.C. She may not have gone to school todayD. She may have been late for schoolSection BDirections:In Section B, you will hear two short passages and one longer conversation, and you will be asked several questions on each of the passages and the conversation. The passages and theconversation will be read twice, but the questions will be spoken only once. When you hear a question, read the four possible answers on your paper and decide which one would be the best answer to the question you have heard.Questions 11 through 13 are based on the following dialogue11. A. He found his TV was broken B. He missed a good TVC. He felt bored with the TV programD. He lost his meal tickets in the cafeteria12. A. He lost fifty dollars B. His time was wastedD. His brain wasn ve‘rytactive D. He watched just one program13. A. Part of the brain is not in useB. Part of the brain becomes more passiveC. It takes longer to process visual informationD. It processes complex information less activelyQuestions 14 through 17 are based on the following dialogue14. A. From the newspaper B. From her classmateC. From her friendsD. From the man15. A. Plant more trees in the school yard B. Organize a picnic on ThursdayD. Build a parking lot for students D. Protect the natural beauty on campus16. A. Attend a meeting B. Attend a classC. Visit her friendsD. Go to the parking lot17. A. Lend her pen to the man B. Go to the administrationC. Support the students action unionD. Give out the handoutsQuestions 18 through 20 are based on the following dialogue18. A. There are numerous languages in the existenceB. Most public languages are essentially vagueC. People differ greatly in their ability to communicateD. Big gaps exist between private and public languages19. A. It is a sign of human intelligence B. It improves with constant practiceC. It is something we are born withD. It varies from person to person20. A. How various languages are related to each otherB. How children learn to use language in particular waysC. How private languages are developed from public onesD. How people of different ages create their own languagesII. Grammar and Vocabulary Section ADirections: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.Wildlife secrets of Nigeria's last wildernessResearchers from Chester Zoo, working with the Nigeria National Park Service, surveyed over1,000 square kilometres of the national park. Known （21）its mountain rainforests, savannah woodlands and rolling grasslands, it is home to some of West Africa's most endangered animals.The cameras （22）(spot) some animals that have never been recorded before in the area and others, like chimps, （23）are rarely seen. Stuart Nixon, the Africa Field Programme Co-ordinator at Chester Zoo, said confirmation of the locations of chimps was an important discovery." Gashaka's been regarded for many years as （24）(have)the biggest population of this Nigeria-Cameroon chimp, which is the rarest chimp subspecies,"he said." We consider it the most important population - that's really （25）we need to count it and see what the status of the chimp is right now - that will ultimately affect what we know about this subspecies elsewhere."The chimp （26） (endanger) across its range in Cameroon and Nigeria. Its total population is down to fewer than 9,000 individuals, of which about 1,000 are thought （27） (live)to live within the borders of the national park. "It's an incredible tool to use these camera traps and to reveal that this park - which is a （28）(forget)forgotten wilderness, really, for Nigeria- still has a really important reservoir of important species for Nigeria and Africa in general," said Stuart Nixon.Chester Zoo is funding guards for the rangers and providing training in wildlife onitoring and protection. "This work is helping us learn more about the secrets of one of our last wilderness areas and we must continue to work together to ensure （29）survival for future generations. "（30）all this beauty were lost it would be a terrible tragedy for all."Section BDirections: Complete the following passage by using the words in the box. Each word can only beWhy India's Pink City' is a Photographer's HeavenThe city of Jaipur is one of India's wonders. It 31 some of the country's most decorative royal palaces-elegant structures designed hundreds of years ago that still attract visitors today. Largely built in the 1700s, Jaipur is surrounded by a city wall and several 32 castles. Considered as a commercial center, it was ahead of its time due to the use of grid iron (网格状) city planning.A romantic dusty pink type-which has 33 the city since 1876, after it was painted pink towel come Queen Victoria's husband, Prince Albert-gives Jaipur its 34 as the "Pink City". This 35 beauty is what first brought HongKong-based photographers Victor Cheng and Samantha Wong to Jaipur.Walking in glass skyscrapers for century-old royal palacesand historic castles, the pair-who have 130,000 Instagram followers between them-said that the images they 36 in Jaipur received a lot of response online. "A lot of our followers hadn't seen this side of India, so we're happy we were able to show this side of the country." Cheng said.For the photographers, one of the city's most fascinating features is the light pink coloring of itsbuildings. “The first gate y ou see when you enter are pink, “ s aid Wang “Once you ‘ re through, everything around you varies in different 37 of the color--from bright pinks to reddish browns."The building is a(n) 38 of the City Palace, and its windows allowed royal women to observe street life without appearing in public. One of Cheng's most striking photos shows a straight front of the building and its hundreds of windows. The building's lively coloring also pushed Cheng to take a different 39 to editing than with images of other cities. "I toned down my usual editing process because the pink was so bright in reality," he said, "I wanted the photos to40 the actual color I was seeing myself and to maintain its tone."III. Reading Comprehension Section ADirections：For each blank in the following passages there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.Concerns about the harm caused by “too much” screen time – particularly when it is spent on social media — are widespread. But working out what a “healthy”41 might be is far from easy.Some negative experiences on social media— like 42 how your appearance compares to others— do affect some children. However, this does not mean that technology use in 43 is harmful and it is difficult to make claims about how it will affect different people.Consider the picture painted by a UNICEF review of existing research into the effects of digital technology on children‘s 44 comforts, including happiness, mental health and social life. Rather than stating that social media was harmful, it suggested a more 45 effect.The UNICEF report highlighted a 2017 study that examined 120,000 UK 15-year-olds. Among those teenagers who were the lightest users, it was found that increasing the time spent using technology was linked to 46 comfort — possiblybecause it was important for keeping up friendships. 47 , among the heaviest users of technology, any increase in time was linked to lower levels of comfort. Overall, the UNICEF study suggested that some screen time could be good for children‘s mental health.A broader look at evidence provided by some other high quality studies again suggests the story is not 48 . An early study in 2013 looked at how the television and video game habits of 11,000 UK five-year-olds affected them two years later. It is one of few studies actually 49 the effects of technology over time. It suggested that, compared with children who watched one hour of television or less on a weekday, a small increase in conduct problems was seen among those who watched more than three hours each day. Playing e lectronic g ames, however, was not seen as leading to a greater 50 of friendship or emotional problems.So how much time should our children spend looking at screens? It i s difficult to be 51 as different people spend time online in such different ways. A useful comparison might be with sugar. Broadly speaking, people 52 that too much sugar can be bad for your health. But the effect it might have can depend on many factors, from the type of sugar to the person and the amount. We would not 53 trust anyone who claims to predict how someone is affected by consuming one gram of sugar. The same could be said for 54 usage: the outcomes depend on so many factors that only very 55 predictions are possible.41. A. amount B. comparison C. experience D. medium42. A. accounting for B. boasting of C. commenting on D. worrying about43. A. general B. particular C. private D. public44. A. domestic B. material C. physical D. psychological45. A. complex B. dramatic C. harmless D. predictable46. A. improved B. maximum C. relative D. small47. A. As a rule B. In contrast C. On the whole D. Worse still48. A. convincing B. definite C. probable D. true49. A. estimating B. experiencing C. reducing D. tracing50. A. connection B. power C. promotion D. risk51. A. balanced B. independent C. precise D. subjective52. A. agree B. forget C. object D. remember53. A. equally B. readily C. reluctantly D. weakly54. A. emotion therapy B. social media C. TV broadcasting D. video game55. A. confident B. optimistic C. rough D. wildSection BDirections: Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the one that fits best according to the information given in the passage you have just read.(A)The cold northern wind here in the streets of Petersburg strengthens my nerves and fills me with delight. I cannot think of the Pole as cold and empty; in my imagination it is a region of beauty and delight. Who knows what strange landscapes and creatures we may find there. I shall satisfy my curiosity with the sight of an unknown part of the world-and walk where no man has before. Thinking of it, I feel the same joy a child feels when he sails his little boat on a voyage of discovery up his native river.This voyage was the favorite dream of my early years. My education was neglected, yet I was passionately fond of reading. Uncle Thomas's library contained only books about exploration, which I read day and night. Finally my thoughts comes to the idea of making a voyage of discovery.Six years have passed sinceI decided on the present voyage. I can, even now, remember the hour when I committed myself to this great enterprise. I began by making my body used to hardship. I went on whale hunting voyages to the North Sea; I voluntarily endured cold, hunger, thirst, and lack of sleep. I often worked harder than the common sailors during the day. Then, at nights, I studied mathematics, the theory of medicine, and sciences of practical importance for a seagoing adventurer. Twice I took jobs as an officer on a Greenland whaling ship. I felt a little proud when my captain asked me to remain with the ship, so valuable did he consider my services. And now, do I not deserve to achieve some great task? My life might have been passed inease and comfort, but I preferred glory to every pleasure that wealth placed in my path.56. What does the author think of the Pole? A.It reminds him of his childhood.B. It must be a region full of surprises.C. It would fulfil his dream to be an adventurer.D. It's too cold a destination with almost nothing.57. To realize his childhood dream, the author got .A. physically prepared by experiencing great sufferingB. spiritually prepared by gaining captain's recognitionC. academically prepared by reading books on explorationD. financially prepared by serving on a whale hunting ship.58. According to the passage, the author is definitely a person full of .A. curiosityB. fancyC. perseveranceD.pride(B)Subject Art & Design, Craft & Creative, BeautyDelivery method OnlineStudy level Professional development, Short. AccreditedRef FACE-GUARDPrice￡30, was ￡299 . use code: GUARD90Face Painting Academy DiplomaStart a career in Face Painting or simply learn for fun. Do you have a love for entertaining people? Are you artistic and want to impress people with a new skill?Have you ever thought about doing a course in face painting so you can earn fantastic money?If so then with this course you could become a qualified face painter just like hundreds of other people who have taken our courses. For a one-off fee一(次性付款), you can study online and complete the diploma in about 28 hours.The comprehensive syllabus (教学大纲) is supported by 16 instructional videos so you can learn all the designs with ease, andyou will learn a wide range of designs including dog, rabbit and spider man. 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The course is intended mainly for those .A. keen on showing off new skillsB. eager to get an academy diplomaC. interested in learning face paintingD. equipped with a unique taste for art60. You can save￡if signing up for the course now.A. 30B.269C. 299D. 32961. Which of the following statements is TRUE about the course?A. It is presented both online and offline.B. It provides not only lessons on business.C. The diploma can be obtained in one day.D. Some clients will be invited to examine your qualification.62. In which module are you likely to learn how to advertise your business?A. Module 4.B. Module 6.C. Module 7.D. Module 10.(C)All across America, students are anxiously finishing their "What I Want To Be .." college application essays, advised to focus on STEM (Science, Technology, Engineering, and Mathematics) by experts and parents who insist that's the only way to become workforce ready. But two recent studies of workplace success contradict the traditional wisdom about "hard skills". Google originally set its hiring systems to sort for computer science students with top grades from top science universities. In 2013, Google decided to test its hiring theory by quickly dealing with large amounts hiring, firing, and promotion data collected since the company's establishment. Project Oxygen shocked everyone by concluding that, among the eight most important qualities of Google's top employees, STEM capability comes in dead last. The seven top characteristics of success at Google are all soft skills: being a good coach; communicating and listening well; possessing comprehension into others, being supportive of one's colleagues; being a good critical thinker and problem solver, and being able to make connections across complex ideas.Those characteristics sound more like what one gains as an English or theater major than as a programmer. Could it be that top Google employees were succeeding despite their technical training, not because of it? After bringing in more experts to dive even deeper into the data, the company enlarged its previous hiring practices to include humanities majors, artists, and even the MBAs (Master of Business Administration).Project Aristotle, a study released by Google this past spring, further supports the importance of soft skill seven in high-tech environments. Project Aristotle analyzes data on inventive andproductive teams. Google takes pride in its A-teams, assembled with top scientists, each with the most specialized knowledge and able to throw down one creative idea after another. Its data analysis revealed, however, that the company's most important and productive new ideas come from B-teams comprised of employees who don't always have to be the smartest people in the room.Project Aristotle shows that the best teams at Google exhibit a range of soft skills: equality, generosity, curiosity toward the ideas of your teammates, understanding, and emotional intelligence. And topping the list: emotional safety. To succeed, each and every team member must feel confident speaking up and making mistakes. They must know they are being heard.STEM skills are vital to the world we live in today, but technology alone, as Steve Jobs famously insisted, is not enough. We desperately need those who are educated to the human, cultural, and social as well as the computational.63. The underlined word: “contradict” most probably means ““.A. add toB. back upC. bring aboutD. conflict with64. Google conducted the studies of workplace success in order to .A. determine what makes a workplace-ready studentB. check whether its hiring system serves the purposeC. prove soft skills are more important than hard onesD. impress its competitors with the employees ‘ excellence65. What can be inferred from Project Aristotle?A. Emotional safety enables people to express themselves freely.B. Listening and hearing helps develop problem-solving abilities.C. Learning from mistakes doesn‘t necessarily m ean improvement.D. Those without specialized knowledge can also make inventions.66. Which of the following is the best title for the passage?A. STEM skills our society needs for better educationB. The principal focus students have on application essaysC. The surprising thing Google learned about its employeesD. The soft skills Google programmers lack for career growthSection CDirections: Read the following passage.Fill in each blank with a proper sentence given in the box. Each sentence can be used only once. Note that there are two more sentences than you need.Car washes have been automated for decades, but companies developing fully autonomous vehicles must rely on a human touch to keep their cars and trucks in working condition.67 For example, soap residue or water spots could effectively "blind" an autonomous car. A traditional car wash's heavy brushes could jar the vehicle's sensors, disrupting their calibration and accuracy. Even worse, sensors, which can cost over $100,000, could be broken.68 Dirt, dead bugs, bird droppings or water spots can impact the vehicle's ability to drive safely.Avis, which has years of experience managing large fleets of rental cars, has been tasked with cleaning and refueling the self-driving van fleet of Waymo, the self-driving arm of Google's parent company. Avis modified three of its branches in the Phoenix area to tend to the Chrysler Pacifica vans." There are special processes that definitely require a lot more care and focus, and you have to clean [the vans] quite often,"69 But other self-driving car companies such as Toyota, Aptiv, Drive.AI and Uber described to CNN that they use microfiber cloths along with rubbing alcohol, water or glass cleaner for manual cleanings.70 This should alleviate some need for manual cleaning. But because autonomous vehicles can have dozens of sensors, Seeva CEO Diane Lansinger doesn't imagine products like this will be able to clean every camera, radar or LIDAR, a laser sensor that most experts see as essential for self-driving vehicles.IV ．Summary WritingDirections: Read the following passage.Summarize the main idea and the main point(s) of the passagein no more than 60 words. Use your own words as far as possible.In one of my earliest memories, I‘m drawing. I don’t remember what the picture is supposed to be, but I remember the mistake. My marker slips, an unintentional line appears and my lip trembles. The picture has long since disappeared. But that feeling of deep frustration, even shame, stays with me.That‘s the thing about perfectionism, a crucially self-defeating way to move through the world. It makes you better at your career and relationships and life in general. Culturally, we often see perfectionism as a positive.But the disadvantage of perfectionism isn’t just that it holds you back from being your most successful, productive-self. Perfectionistic tendencies have been linked to a laundry list of clinical issues: depression and anxiety (even in children), self-harm, social anxiety disorder, eating disorders, and most damaging of all, suicide.“Based upon the 60-odd studies that we‘ve done,the higher the perfectionism is, the more psychological disorders you’re going to suffer,”says York St John University‘s Hill.“Factors often labeled ‘healthy’ perfectionism, like striving for excellence, aren‘t actually perfectionism at all. They’re just conscientiousness（尽职尽责）–which explains why people with those tendencies often have different outcomes in studies. Perfectionism isn ‘t defined by working hard or setting high goals. It‘s that critical inner voice.”Take the student who works hard and gets a poor mark. If she tells herself: “I’m disappointed,but it‘s o kay; I‘m still a good person overall,” th at‘s healthy. If the message is: “I‘m a failure. I‘m not good enough, “that‘s perfectionism.Perfectionists can make smooth sailing into a storm, a brief ill wind into a category-five hurricane. Eventually, the behaviours perfectionists adapt, actually, do make them more likely to fail.V. TranslationDirections: Translate the following sentences into English, using the words given in the brackets.72.他一直提醒自己不要对他人太苛刻。

巴蜀中学2018 届高考适应性月考卷(二)理科综合生物—、选择题1. 组成生物体的细胞既具有多样性，又具有统一性。

下列叙述正确的是A. 不同物种的细胞所含有机分子的结构都不同B. 同一个体的不同细胞，其元素含量都相同C. 原核细胞与真核细胞的区别之一在于DNA分子在细胞内的主要存在形式D. 细胞学说揭示了细胞的统一性和多样性，以及生物体结构的统一性【答案】C【解析】不同物种的细胞所含有机分子有糖类、脂质、蛋白质和核酸等，糖类和脂质在不同物种的细胞中结构没有特异性，各细胞都相同，A错误；同一个体的不同细胞，其元素种类大致相同，而含量相差较大，B错误；DNA在原核细胞中存在于拟核和质粒中，而DNA在真核细胞中主要存在于细胞核中的染色体上，故C正确；细胞学说并未揭示细胞的多样性，D错误。

考点：细胞中的元素和化合物、细胞学说的内容点睛：本题要求掌握有关细胞结构的相关基础知识，考查考生把握所学知识的要点和知识之间内在联系的能力。

2. 下列选项中，一般而言H/0比值前者高于后者的是A. 葡萄糖麦芽糖B. DNA RNAC. 自由水结合水D. 糖类脂质【答案】B【解析】葡萄糖的分子式为C6H12O6，麦芽糖的分子式为C12H23O11，由此可知葡萄糖的H/O比值低于麦芽糖，A错误；DNA比RNA的氧原子少，故DNA中H/O比值比RNA高，B正确；自由水和结合水都是H2O，自由水的H/O比值等于结合水的，C错误；一般而言，糖类的氧含量高于脂质，故糖类的H/O比值比脂质的低，D错误。

考点：细胞中化合物的元素组成点睛：解决该题的关键在于熟记各种化合物的元素组成及特点3. 下列有关生物体内化合物或结构的叙述，正确的是A. 盐析后的蛋白质分子，其空间结构变得伸展、松散B. 核酸的唯一功能是携带和传递遗传信息C. 多糖具有多样性的原因就在于葡萄糖数目不同D. 念珠藻细胞中含有藻蓝素和叶绿素，是自养生物【答案】D【解析】盐析后的蛋白质分子，其结构并没有变化，A错误；核酸包括DNA和RNA，如rRNA 是构成核糖体的成分，B错误；多糖有纤维素、淀粉和糖原，其结构不同的原因在于葡萄糖数目不同及其空间结构不同，C错误；念珠藻属于蓝藻，其细胞中含有藻蓝素和叶绿素，能进行光合作用，是自养生物，D正确。

2018学年度高三二模理综试卷及答案可能用到的相对原子质量H～1 O～16 C～12 N～14 S～32 F～19 Cl～35.5 Br～80 I～127 Si～28 Na～23 K～39 Ca～40 Mg～24 Al～27 Fe～56 Cu～64 Ag～108 Zn～65 Ba～137 Mn～55 Pb～207第Ⅰ卷(选择题共126分)一、选择题：本大题共13小题，每小题6分。

在每小题给出的四个选项中，只有一项是符合题目要求的。

1．用15N标记含有100个碱基对的DNA分子（其中有腺嘌呤60个），该DNA分子在含14N 的培养基中连续复制4次。

下列有关判断错误的是A．含有15N的DNA分子有两个B．含有14N的DNA分子占总数的7／8 C．第四次复制消耗胞嘧啶脱氧核苷酸320个D．复制结果共产生16个DNA分子2．现用洋葱根尖进行如下处理并完成实验：①用蒸馏水培养根尖，观察有丝分裂；②将正常培养的装置移到冰箱中再培养一段时间，观察并统计有丝分裂中期的染色体数；③在蒸馏水中加入一定量的甲苯培养根尖，观察有丝分裂中期染色体的形态和数目。

下列相关叙述合理的是A．实验①应先在低倍镜下找到长方形细胞，再换用高倍镜观察染色体变化特点B．实验②是为了验证“低温可能是形成多倍体的诱因”，其原理是低温抑制着丝点分裂C．实验③的目的可能是研究甲苯对染色体结构和数目的影响，但还需设计对照组D．实验③依据的原理之一是“致癌物质会使细胞发生基因突变，原癌基因被激活”3．在一个新鲜萝卜中挖一凹槽，在凹槽中放入浓盐水。

一段时间后，萝卜变软，凹槽中水分增多。

下列图示的实验与此实验原理差异最大的是（）4. 溶菌酶是存在于眼泪和白细胞中的酶，有杀菌功能，整个分子大致呈球形，故称为球蛋白(如图)。

下列关于溶菌酶的说法，不正确的有( )①溶菌酶从细胞进入泪液不穿过生物膜②溶菌酶是由两条多肽链共同组成的③双缩脲试剂5%NaOH溶液与1%CuSO4溶液等体积混合后与溶菌酶反应呈紫色④溶菌酶的空间结构与其功能密切关系⑤溶菌酶的杀菌作用属于特异性免疫A.一项B.两项C.三项D.四项5.如图表示处于平衡状态的某生物种群因某些外界环境变化导致种群中生物个体数量改变时的四种情形，下列有关叙述中，不正确．．．的是A．若图①所示为草原生态系统中某人工种群，则a点后的变化可能原因是过度放牧B．若图②所示为培养液中的酵母菌种群，则b点后的变化可能原因是天敌的减少C．图③中c点后发生的变化表明生态系统的自我调节能力有一定限度D．图④曲线可用于指导海洋捕捞，维持资源种群数量在K/2左右6．下图为人体内某些生理过程示意图解。