江西省丰城中学、高安二中等六校2021届高三1月联考理科综合 学生版

word文档某某省某某中学、高安二中、上高二中.樟树中学.丰城中学2021届高三物理上学期五校联考试题本试卷总分值为100分，考试时长：100分钟一、选择题（每题4分，共计48分，第「7题为单选，第8-12題为多选，全选对的得4分，选对但不全的得2分，有选错的得0分）1.从宏观角度看，导体两端有电压，导体中就形成电流：从微观角度看，若导体内没有电场，自由电子就不会定向移动。

现対电路中一段金属直导线进行分析：设该导线电阻率为P，导线内场强为£单位体积内有门个自由电子，电子电荷量为e,自由电子定向移动的平均速率为几现将导线中电流与导线横截而积的比值定义为电流密度，其大小用丿•表示。

则下列表达式正确的是（）A.j = npvB. P = m c.疋=丄 D. E = pjP【答案】D2.己知一质点做变加速直线运动，初速度为lOm/s：其加速度随位移线性减小关系满足条件＜5=8-2AS当位移为3m时质点瞬时速度更接近（）【答案】A3.如图，从高〃处的月点先后平抛荫个小球1利2,球1刚好直接越过竖直挡板落到水平地面上厂点, 球2则与地面碰撞两次后，刚好越过竖直挡板MV,也落在万点。

设球2每次与水平面碰撞都足弹性碰撞，空气阻力忽略不计，则竖直挡板的高度力是（）3 5 3 4A.-HB. -HC. —HD. -H49 5 5【答案】B4.如图，光滑圆弧槽面末端切线水平，并静宜-质量为皿的小球Q,另一质量为皿的小球P从槽面上某点静止释放，沿槽面滑至槽II处与Q球止碰，设碰撞过程中无能最损失，两球落地点到0点水平距离之比为1：3,则P、Q两球质屋比不可能是（）2 / 9A. 3： 1 B ・ 3： 5 C. 2： 3 D. 1： 7【答案】c5.如图所示电路中，电阻“、b 、c 、d 的阻值均为r,其他电阻不计，理想变压器原、副线圈的匝数比/V/?2=2：l, M. N 间输入的正弦式交变电流的电压冇效值为从则电阻"中的电流有效值人小为（）【?• i J B6.如图所示，空间直角坐标系的・Y0Z 平面是光滑水平面，空间中有沿Z 轴正方向的匀强磁场，磁感应强度 人小为風现有两块平行的薄金属板.彼此闻距为出构成一个电容为C 的电容器，电容器的卜极板放在・Sz 平而上：在两板之间焊接」根垂直于两板的电阻不计的金属杆血；已知两板和杆JZV 的总质量为如 若对杆施加一个沿x 轴正方向的恒力斤 两金属板和杆开始运动后，则（A. 金属杆泾中存在沿.V 到到"方向的感应电流B. 两金属板间的电压始终保持不变 A .2UV3〃 B. -------5r3UC.—2rC. D .两金属板和杆做加速度人小为B 2d 2C 的匀加速单位时间内电容器增加的电荷崑为 CBdF m +3 / 97•如图所示，A、B、C三个带电小球质最均为皿A、B分别穿在同一竖直线上的两根绝缘细杆上，上方细worxL杆粗糙，下方细杆光滑。

江西省丰城中学、高安二中等六校2021届上学期高三年级1月联考历史试卷丰城中学高安二中上高二中樟树中学新余一中宜春中学1《群书治要•魏志下》上讲道：“昔夏、殷、周历世数十，而秦二世而亡。

何则三代之君，与天下共其民，故天下同其忧也。

秦王独制其民，故倾危莫救也。

”对此合理的解读是（）A分封制有利于政权的长期稳定B分封制实现了君民共治和谐C分封制与郡县制应优势互补D对百姓的态度攸关王朝兴衰2下图是连环画家王弘力绘制的《中国古代风俗百图·唐内宴冷餐》。

清明作为节气有很多风俗习惯。

有民俗学者称,古代的清明节,除了有祭奠逝者的悲伤,还有万众踏青、郊游、戴柳、射柳、斗鸡、放风筝、打秋千、蹴鞠踢球等种种活动。

下列诗句中,描写清明节的是（）A御赐冷食满宫楼,鱼龙彩旗四面稠B千门万户曈疃日,总把新桃换日符C遥知兄弟登高处,遍插茱萸少一人D华阳洞里秋坛上,今夜清光此处多3学者漆侠在《宋代经济史》中认为，宋朝商品经济流通有两种运动形式：一是农副产品的“求心”运动，即粮食、布帛等来自农村的产品通过镇市向城市集中；一是手工业品的“辐射”运动，即手工业产品在某一城市大量生产后，由商人运往各地经销。

这表明（）A．城市商业的发展为农产品商品化提供条件B．商业发展使宋朝城市和农村贫富分化拉大C．农产品涌入城市使宋朝产生资本主义萌芽D．商品经济的发展使宋朝城市发展依赖农村4乾隆帝认为:“乾纲在上，不致朝廷有名臣、奸臣,亦社稷之福耳。

”并标榜，“前代所以亡国者，曰强藩,曰外患,曰权臣,曰外戚,曰女谒,曰宦寺,曰奸臣,曰佞幸，今皆无一仿佛者”。

上述材料表明,乾隆帝时期（）A 政治统治比较清明B 官员管理比较严格C 注重对官员的控制D 善于提高官员品德5李鸿章在两江总督任上开设了金陵机器制造局，左宗棠则以闽浙总督的身份创办了福州船政局。

在各个地区性集团之间，几乎没有什么合作和协调，即使这些大员调任他所，他们继续与从前创办的企业保持着私人联系。

江西省丰城中学、高安二中等六校2021届高三化学1月联考试题7. 下列材料或物质的应用与其对应的性质完全相符合的是（）A．食品盒中常放一小袋Fe粉—Fe粉具有还原性B． Mg、Al合金用来制造飞机外壳—合金熔点低C．葡萄酒中含SO2—SO2有漂白性D． SiO2用来制造光导纤维—SiO2耐酸性8.空气中的硫酸盐会加剧雾霾的形成，我国科学家用下列实验研究其成因：反应室底部盛有不同吸收液，将SO2和NO2按一定比例混合，以N2或空气为载气通入反应室，相同时间后，检测吸收液中 24SO的含量，数据如下：反应室载气吸收液SO42-含量数据分析①N2蒸馏水 aⅰ. b≈d＞a≈cⅱ.若起始不通入NO2，则最终检测不到SO42-②3%氨水 b③空气蒸馏水 c④3%氨水 d．．．A．控制SO2和氮氧化物的排放是治理雾霾的有效措施B．本研究表明：硫酸盐的形成主要与空气中O2有关C．反应室①中可能发生反应：SO2 + 2NO2 + 2H2O ===H2SO4 + 2HNO2D．农业生产中大量使用铵态氮肥可能会加重雾霾的形成9. 冰晶石(Na3AlF6)微溶于水，工业上用萤石(CaF2含量为96%)、二氧化硅为原料，采用氟硅酸钠法制备冰晶石，其工艺流程如下：据此分析，下列观点不正确．．．的是（）A．滤渣A的主要成分是CaSO4B．上述流程中，所涉反应均为非氧化还原反应C．“操作i”可用硅酸盐质设备进行分离D．流程中可循环使用的物质除H2SO4、SiO2外，滤液B经浓缩后也能循环使用10．科学家合成一种化合物是很多表面涂层的重要成分，其结构如图所示，其中W、X、Y、Z为原子序数依次增大的短周期主族元素，只有X、Y在同一周期。

下列说法错误的是（）A．W、X、Y形成的某种化合物可使澄清石灰水变浑浊B．氢化物的沸点：X<YC．含Z的两种酸反应可制得Z 单质D．ZY2作为一种高效安全绿色杀菌剂，在自来水消毒等方面应用广泛11．镁离子是多种酶的活化剂，促进体内糖类转化及代谢，促进脂肪和蛋白质的合成。

2020-2021学年江西省宜春市丰城第二中学高三物理月考试卷含解析一、选择题：本题共5小题，每小题3分，共计15分．每小题只有一个选项符合题意1. 理想实验有时更能深刻地反映自然规律，如图所示，伽利略设计了一个理想实验：①如果没有摩擦，小球将上升到原来的高度；②继续减小右边斜面的倾角，最后使它成为水平面，小球要沿水平面作匀速直线运动；③减小右边斜面的倾角，小球在这斜面上仍然要达到原来的高度；④在两个对接的斜面上，让静止的小球沿左边的斜面滚下，小球将滚上右边的斜面。

（1）请将上述关于理想实验的描述按正确的逻辑顺序排列：_____________（只要填写序号）。

（2）上述关于理想实验的描述中，有的属于可靠的事实，有的是理想化的推论，下列关于事实和推论的分类正确的是：（A）①是事实，②、③和④是推论（B）②是事实，①、③和④是推论（C）③是事实，①、②和④是推论（D）④是事实，①、②和③是推论参考答案：④①③②[ D ]2. 如图所示，弹簧秤外壳质量为，弹簧及挂钩的质量忽略不计，挂钩吊一重物质量为m，现用一方向竖直向上的外力F拉着弹簧秤，使其向上做匀加速直线运动，则弹簧秤的读数为（）A. B. C. D. 参考答案：D3. 一个带电粒子若只受到电场力的作用，则下列叙述中正确的是：A．粒子可能保持静止B．粒子可能做匀速直线运动C．粒子可能做匀变速直线运动D．粒子可能做匀速圆周运动参考答案：答案：CD4. 一人乘电梯从1楼到30楼，在此过程中经历了先加速，后匀速.再减速的运动过程，则下列说法正确的是：（）A、电梯支持力对人做功情况是加速时做正功，匀速时不做功，减速时做负功B、电梯支持力对人做功情况是加速和匀速时做正功，减速时做负功C、人开始的一段时间失重，最后的一段时间超重D、人开始的一段时间是超重，最后的一段时间是失重参考答案：D5. 我国神舟七号宇宙飞船搭载的伴飞小卫星于北京时间2008年9月27日19时24分成功释放，以缓慢速度逐渐离开飞船，这是我国首次在航天器上开展微小卫星伴随飞行试验。

2021届六校联考文综试卷答案1-5ADBCD6-10CCBCD11-15DBABB16-20DCBBA21-25ADBDA26-30ACAAD31-35BCDBC36.【答案】（1）沟壑地形，地势起伏大，夏季多暴雨，水土流失严重；沙棘林带与坡面径流方向垂直，能有效拦水拦沙，利于水土保持。

（每点2分）（2）该地区春季降水少，蒸发强，干旱严重；夏季多雨，秋季土壤墒情好（土壤水分条件较好），幼株易成活。

（每点2分）（3）保鲜技术差，储运成本高；加工工艺落后，产品质量不高；市场开发不足，销售渠道不畅。

（每点2分）（4）赞同：质优高产，经济效益高；提升产业规模，带动相关产业发展；增加就业。

不赞同：可能破坏本地生物链的稳定，影响生物多样性；引进品种可能不适应本地环境，不宜盲目扩种；规模扩张过快，可能导致产品销售受阻。

（每点2分）37.【答案】(1)天然气管线处于地中海—喜马拉雅地震带，地壳运动活跃地震多发；滑轨设计利于克服地震的不利影响，提高天然气输送的安全性。

（每点2分）(2)优点：全部位于陆地，天然气输送无须转运，连续性强；无须海运，受气象条件干扰少。

缺点：管线途径山区和地震带，受地质灾害影响大，安全性较低；经过国家多，天然气管线管理不便。

（每点2分）(3)印度河中上游加大农业开发，增加了水资源消耗，导致M河段水量减少，引发沿岸地区荒漠化扩展；中上游地区农业开发引发水土流失，导致M河段河道泥沙淤积加剧；农药和化肥的大量使用，导致M河段水污染加剧。

（每点2分）(4)加强该地区与中上游地区水资源的管理和协调；调整该地区农业种植结构，减少水资源消耗；发展节水农业；种植耐旱作物；推广喷灌滴灌技术；减少农药化肥使用，减轻水污染。

（任答4点得8分）38.【答案】(1)①在市场需求旺盛、农产品供应不足的情况下，扩大生产规模，能够增加农民收入；②在农产品品种低劣、市场供过于求、生产成本过高等情况下，扩大生产规模，会造成“丰产不丰收”；③增加农民收入不能仅依靠提高农产品供给数量，还要以市场为导向，提高产品质量、实行供给侧结构性改革、优化产品结构、创新生产经营模式等。

【高三】江西宜春中学丰城中学樟树中学高安二中四校2021届高考联考押题卷2021年宜春四校高考理综押题卷1nut23ch可能将使用的相对原子质量h-1c-12n-14o-16mg-24s-32k-39ca-40cr-52fe-56第i卷(选择题共126分)一、选择题(本大题共13小题，每小题6分后，共78分后。

在每小题得出的四个选项中，只有一项就是合乎题目建议的)1．关于酶与atp的叙述正确的是（）a．在“探究酶的专一性”实验中，自变量就可以就是酶的种类b．人长时间剧烈运动时，骨骼肌细胞中每摩尔葡萄糖生成atp的量与安静时相等c．酶只在核糖体上制备，atp在细胞质基质、叶绿体和线粒体等场所制备d．atp中含有核糖，形成时需要酶的催化；酶中可能含核糖，形成时需要消耗atp2．以下关于甲状腺激素的描述，错误的就是（）a．碘是构成甲状腺激素的元素，由甲状腺细胞主动运输吸收b．给实验动物补足甲状腺激素，可以静脉注射，也可以口服c．甲状腺激素与肾上腺素在恒温动物体温调节过程中，具有协同作用d．甲状腺激素排泄的调节存有分级调节，没意见反馈调节3．有关细胞生命历程的说法不正确的是（）a．细胞生长：细胞体积减小，细胞膜面积减小，物质运输效率进一步增强b．细胞分化：核遗传物质选择性表达，trna没有变化，但mrna有变化c．细胞癌变：细胞形态变化，细胞极易迁移，就是多个基因出现变异引致的d．细胞凋亡：有的基因活动加强，有的基因活动减弱，有利于个体的生长发育4．某种昆虫掌控翅色的等位基因种类共计五种，分别为va、vb、vd、ve、v。

其中va、vb、vd、ve均对v为显性。

va、vb、vd、ve互为显性，都可以整体表现出来各自掌控的性状。

该昆虫体细胞中的基因成对存有，则基因型种类和翅色性状种类依次分别为（）a．15和10b．10和7c．15和11d．25和75．分析生长素和乙烯对某植物生长影响的曲线图，以下有关推断合理的就是()a．b时刻后茎段以最大且恒定速率生长b．a、c两个时刻植物茎段的生长速率相同c．茎段的生长速率可能与生长素浓度成正相关d．乙烯减少至一定浓度时可能会遏制生长素的制备6．下列关于变异和进化的叙述中，正确的是（）a．基因突变一定能发生改变生物的表现型b．一个物种的形成或绝灭，会影响到若干其他物种的进化c．基因重组通常出现在有性生殖细胞构成过程中，可以产生代莱性状d．生物多样性的形成也就是新的物种不断形成的过程29．（10分后）右图甲则表示春季晴天某密封蔬菜大棚内一昼夜co2浓度的变化。

绝密★启用前
江西省宜春市六校联考联盟
(宜春一中高安二中樟树中学丰城九中万载中学宜丰中学) 2021届高三毕业班上学期第一次联合质量检测
地理试题
一、选择题（25×2=50分）
下图为中亚某区域等高线(单位: m)图。

读下图完成下面小题。

1．下列四地中，海拔高度可能相同的是（）
A．①③B．①④C．②③D．①②
2．若a、b、c是甲湖泊三个不同时期的水面状况，则c最可能是（）
A．1月B．7月C．10月D．4月
3．甲湖泊始终是淡水湖的原因可能是（）
A．海拔相对较低 B．降水量大
C．湖水蒸发量小D．与咸水湖有相通
下图为2020年3月某日10点、24点我国某区域海平面气压分布图。

读图完成4～5题。

4．该日10点，吹偏南风的地点是（）
A．③ B．④ C．① D．②
5．14小时期间，由低压槽将转为高压脊影响的是（）
A．③B．④ C．① D．②
风火山地处青藏高原多年冻土分布区，多年冻土活动层的夏季融化深度为0.8-1.5m，土壤发育缓慢。

区域内植被群落类型有高寒沼泽草甸、高寒高草草甸、高山草原。

下图表示2004-2020年风火山多年冻土区风速、气温、相对湿度的月平均值。

读图，完成下面小题。

6．决定该区域夏季气温的主导因素是（）
A．太阳辐射B．植被C．海拔D．土壤
7．该区域冬季相对湿度低的主要原因是（）
①风力小,蒸发弱②土壤冻结,蒸发弱③气温低,蒸发弱④白昼短,蒸发弱
A．①④B．②③C．①③D．②④。

江西省宜春市丰城第一中学2021年高三物理月考试题含解析一、选择题：本题共5小题，每小题3分，共计15分．每小题只有一个选项符合题意1. 如图所示，直线是真空中某一电场中的一条电场线，A．B是该电场线上的两点。

一个电子以速度v A经过A点向右运动，经过一段时间后，该电子以速度v B经过B点，且v B速度方向向左。

下列说法中正确的是A．A点处的场强一定大于B点处的场强B．A点的电势一定低于B点的电势C．电子在A点的动能一定小于它在B点的动能D．电子在A点的电势能一定小于它在B点的电势能参考答案：D2. （多选）如图所示，一个绝缘且内壁光滑的环形细圆管，固定于竖直平面内，环的半径为R（比细管的内径大得多），在圆管内的最低点有一个直径略小于细管内径的带正电小球处于静止状态，小球的质量为m，带电荷量为q，重力加速度为g．空间存在一磁感应强度大小未知（不为零），方向垂直于环形细圆管所在平面且向里的匀强磁场．某时刻，给小球一方向水平向右，大小为v0=的初速度，则以下判断正确的是（）A．无论磁感应强度大小如何，获得初速度后的瞬间，小球在最低点一定受到管壁的弹力作用B．无论磁感应强度大小如何，小球一定能到达环形细管的最高点，且小球在最高点一定受到管壁的弹力作用C．无论磁感应强度大小如何，小球一定能到达环形细管的最高点，且小球到达最高点时的速度大小都相同D．小球在从环形细圆管的最低点运动到所能到达的最高点的过程中，机械能不守恒参考答案：BC考点：带电粒子在匀强磁场中的运动．专题：带电粒子在磁场中的运动专题．分析：由左手定则可判定小球受到的洛伦兹力始终指向圆心，对受力分析，结合圆周运动方程可分析小球是不是受到弹力；由于洛伦兹力不做功，由动能定理可判定小球是否能到最高点；由曲线运动的速度方向，以及速度的分解可以判定小球运动过程中，水平速度的变化．解答：解：A、由左手定则可判定小球受到的洛伦兹力F始终指向圆心，另外假设小球受到管道的支持力N，小球获得v0=的初速度后，由圆周运动可得：F+N﹣mg=m解得：N=mg+m﹣F=mg+m﹣qv0B可见，只要B足够大，满足mg+m =qv0B，支持力N就为零，故A错误．BC、由于洛伦兹力不做功，只有重力对小球做功，故小球能不能到最高点与磁感应强度大小无关，从最低点到最高抵过程中，由动能定理可得：﹣mg2R= mv2﹣mv02解得：v=，可知小球能到最高点，由于当v=，小球受到的向心力等于mg，故此时小球除受到重力，向下的洛伦兹力之外，一定还有轨道向上的支持力大小等于洛伦兹力，故B、C正确．D、对小球的速度分解在水平和竖直方向上，小球在从环形细圆管的最低点运动到所能到达的最高点的过程中，水平方向分速度先减小，至圆心等高处，水平分速度为零，再往上运动，水平分速度又增加，故D错误．故选：BC．点评：该题要注意洛伦兹力不做功，只改变速度方向，掌握基本的圆周运动公式，要知道一个临界问题，即最高点时，重力充当向心力，v=3. （单选）在地面上方的A点以E1=3J的初动能水平抛出一小球，小球刚要落地时的动能为E2=7J，落地点在B点，不计空气阻力，则A、B两点的连线与水平方向的夹角为( )A．30° B．37° C．45° D．60°参考答案：A4. 湖中O点有一观察站，一小船从O点出发向东行驶4km，又向北行驶3km。

2021届江西省六校高三英语联考试题丰城中学、高安二中、上高二中、樟树中学、新余一中、宜春中学命题人：高安二中审题人：高安二中 2021、元、2（3）本试卷总分值为150分考试时长120分钟考试范围：高考范围第二部分:阅读理解(共两节，满分40分)第一节(共15小题；每小题2分，满分30分)阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。

AThe New York Pass©The New York Pass© looks like a credit card, and provides free entry into over 100 of New York City's top attractions as well as numerous discounts at restaurants and retailers.You have the option of selecting the pass for 1, 2,3,5,7 and 10 days. There is no limit to how many attractions you are able to visit with the pass, regardless of duration(持续时间). Simply buy your chosen pass and download instantly using our app (or get it delivered/collect in city). Then scan your pass to enter any of the 100+ attractions.How to get your New York Pass©Pick your pass duration (1,2,3,5,7 or 10 days) and download your mobile pass instantly using our app. If you prefer a physical pass simply choose delivery (we deliver worldwide) or collect on arrival in New York.How to use your New York Pass©You now have free access to any of the 100+ top attractions included for the duration of your pass. Your pass is only activated when you visit your first attraction and is valid for consecutive(连续的) days (not 24-hour periods).How to pre-book toursThe majority of the 100+ attractions don't require any pre-booking, you can simply turn up, scan your pass and head straight inside. Some of the timed tours do require pre-booking and all information can be found in the app and/or in the pocket sized guidebook.How to get fast track entryThe New York Pass© offers fantastic time saving benefits. You can skip the ticket line (does not apply to security lines) at top attractions. Just look for the signs, show the attendant your pass and skip the ticket line.21.What do we learn about the New York Pass©?A. It offers you five duration choices.B. You must book your tours in advance.C. You must activate it right after you get it.D. It doesn’t limit the number of attractions.22.How many ways do you have to get your New York Pass©?A. OneB. TwoC. ThreeD. Four23.What is the greatest advantage of The New York Pass©?A. Lower prices.B.Higher efficiency.C. Better service.D. More attractions.BI’ve loved my mother’s desk since I was just tall enough to see above the top of it as mother sat doing letters. Standing by her chair, looking at the ink bottle, pens, and white paper, I decided that the act of writing must be the more wonderful thing in the world.Years later, during her final illness, mother kept different things for my sister and brother. “But the desk,” she’d said again, “it’s for Elizabeth.”I never saw her angry, never saw her cry. I knew she loved me; she showed it in action. But as a young girl, I wanted heart-to-heart talks between mother and daughter.They never happened. And a gulf opened between us. I was “too emotional(易动感情的)”. But she lived “on the surface”.As years passed I had my own family. I loved my mother and thanked her for our happy family. I wrote to her in careful words and asked her to let me know in any way she chose thatshe did forgive me.I posted the letter and waited for her answer. None came.My hope turned to disappointment, then little interest and, finally, peace— it seemed that nothing happened. I couldn’t be sure that the letter had even got to mother. I only knew that I had written it, and I could stop trying to make her into someone she was not.Now the present of her desk told, as she’d never been able to, that she was pleas ed that writing was my chosen work. I cleaned the desk carefully and found some papers inside —a photo of my father and a one-page letter, folded and refolded many times.Give me an answer, my letter asks, in any way you choose. Mother, you always chose the act that speaks louder than words.24. The passage shows that ______.A. mother was cold on the surface but kind in her heart to her daughterB. mother was too serious about everything her daughter had doneC. mother cared much about her daughter in wordsD. mother wrote to her daughter in careful words25. The word “gulf” in the passage means ______.A. deep understanding between the old and the youngB. free talks between mother and daughterC. different ideas between the mother and the daughterD. part of the sea going far in land26. What did mother do with her daughter’s letter asking forgiveness?A. She had never received the letter.B. For years, she often talked about the letter.C. She read the letter again and again till she died.D. She didn’t forgive her daughter at all in all her life.27. What’s the best title of the passage?A. My letter to MotherB. My mother’s DeskC. Mother and ChildrenD. Talks between Mother and MeCThe next time a giant Big Mac or Coke flashes into your mind when you’re walking home from the pub, you may not simply have the snacks.A British hi-tech company has created a new advertising system that uses lasers (激光) to project images up to 200 metres tall from the sides of tall buildings, enabling advertisers to reach people from virtual billboards in the sky. Passers-by will see each image for only between one tenth and quarter of a second, as their eyes catch the light from certain angles.Advertising agencies and big businesses have already signalled their interest, but Skyline campaigners have branded the technology “greedy” and said that it could fill our skies with showy and tasteless brands.The Echo system uses a high laser projector to bounce light off a narrow reflective strip fixed to the side of a building, visible up to 1km away. This creates large-scale images that are captured briefly in the viewer’s eye as a result of the “persistence of vision” effect: the same effect that leaves an imprint (印记) of a light source on your vision after you’ve turned away.Daniel Siden, the technology’s inventor, explained: People often think this could be subversive, but it’s actually less invasive and more fun than traditional advertising. Mr.Siden said that the system was safe because of the distance between the projector and passers-by. And images would be above the line of sight of drivers and cyclists and below the field of vision of airline pilot. The images have been tested and shown not to cause epileptic seizures (癫痫发作).Because it uses only one strip of reflected light, the system needs a small amount of the power, about one-twentieth of a standard 96-sheet digital outdoor display for an image of the same height.Still, some Skyline campaigners dislike the technology and believe it delivers subliminal advertising (隐形广告). Barbara Weiss of the Skyline Campaign, said: “It’s actually offensive. London’s latest tall buildings are not particularly well-built or well designed, but unfortunately people a re forced to look at them. Adding stupid advertising that’s invasive in its nature will only make it worse.”28.Why does the writer use the example of Big Mac, Coke in paragraph 1?A. Because he attempts to promote these products to potential consumers.B. Because he wants to introduce a new advertising technology to readers.C. Because he studies the association between products and images in advertising.D. Because he tries to illustrate the effectiveness of flashing images of advertised goods.29. Which of the following statements about the Echo system is true according to the passage?A. It’s a new system developed by an advertising agency.B. The image will no longer exist in vision after you’ve turned away.C. The system consists of a laser projector, a reflective strip and a physical billboard.D. Pedestrians can see the flashing images from specific angles.30. The underlined word “subversive” in paragraph 5 probably means ________.A. damagingB. subconsciousC. harmlessD. imaginative31. Which party is likely to set obstacles to the application of the Echo system?A. Environmentalists worried about energy consumption.B. The Skyline Campaign regarding the technology as flashy.C. Drivers, cyclists and pilots whose sight might be affected.D. The patients who suffer from epileptic seizures.DIt is quite apparent that competition surrounds every aspect of human life whether in the United States or the Amazon rainforest. Without it we would not have grown into primates (灵长类动物) . Or we would probably still be struggling to sharpen a bronze tool while crawling around on four legs in search of meat. Without competition, Columbus wouldn’t have discovered America and Edison would never have invented the light bulb.Friendship, like all relationshi ps between two people, involves competition. It isn’t competition in a traditional sense because there are no goals to be scored and no prize. Perhaps the ecological definition --- the simultaneous (同时) demand by two or more organisms for limited environmental resources, such as nutrinents, living space, or light --- better explains it.As in nature, high school life is governed by a set of laws, similar to a shortened version of Darwin’s theory of evolution, overpopulation, and competition. There is an abu ndance ofhigh school students and to distinguish them, ranking and categorizing (分类) take place. In high school, friendships learn to coexist with competition even though at times the relationship is rough. In fact, in some circumstance, competition is too much of a burden for a friendship to bear, causing it to fall apart. College admission is the final high school objective. Four years of hard work is to achieve good grades, and a student’s fate is determined not only by these achievements, but by the records of thousands of other seniors trying to achieve a similar recognition.Nevertheless, by necessity, competition between students exists in all aspects of high school life. It sets and improves the standards in everything from sports to schoolwork. A healthy, friendly competition can have only benefits, but when it becomes too fierce, jealousy (妒忌) can tear friendships apart. Yet, despite all this, without competition, we would be lost.32. What does the ecological definition mainly explain?A. How to win the competition.B. How friends compete with each other.C. What competition exactly is.D. What the result of competition is.33. According to the writer, we can infer that high school students compete is because_____.A. they know the laws of nature well.B. they are divided into different groups.C. friendship is a burden for them.D. the number of them is too large.34. Which best describes the relationship of friendship and competition?A. Friendship is always based on competition.B. The degree of competition is vital to friendship.C. Competition is a result of lost friendship.D. Competition is terribly harmful to friendships.35. What does the author think of “competition”?A. The result of competition are out of control.B. Competition becomes fierce in high school.C. Competition is certain to happen at school.D. Friendship is not as important as competition at school.第二节(共5小题；每小题2分，满分10分)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。