第三单元练习答案
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2024年人教版五年级上册数学第三单元课后练习题(含答案和概念)试题部分一、选择题:1. 在下列分数中,与1/2相等的是()。
A. 2/4B. 3/6C. 4/8D. A和B2. 一个分数,分子和分母同时乘以3,这个分数的大小()。
A. 扩大3倍B. 缩小3倍C. 不变D. 无法确定3. 下列分数中,与3/5相等的分数是()。
A. 6/10B. 9/12C. 12/15D. A、B和C4. 0.25、25%、1/4这三个数中,()最大。
A. 0.25B. 25%C. 1/4D. 一样大5. 下列分数中,不是最简分数的是()。
A. 2/3B. 3/4C. 4/6D. 5/76. 一个分数,分子大于分母,这个分数()。
A. 真分数B. 假分数C. 等于1D. 无法确定7. 1/2与1/3的和是()。
A. 1/5B. 2/5C. 3/5D. 4/58. 1/4、1/5、1/6这三个分数中,()最大。
A. 1/4B. 1/5C. 1/6D. 一样大9. 下列分数中,能与1/2组成互质数的是()。
A. 3/4B. 2/3C. 4/7D. 5/610. 两个分数相加,若分母相同,则它们的和是()。
A. 分母扩大B. 分母缩小C. 分子相加D. 分子相减二、判断题:1. 分子和分母相等的分数,其值一定等于1。
()2. 分数的大小与分子和分母的大小有关。
()3. 分数的分子和分母同时乘以相同的数,分数的大小不变。
()4. 两个真分数相加,其和一定小于2。
()5. 两个假分数相加,其和一定大于2。
()6. 分母越大,分数越小。
()7. 分子越大,分数越大。
()8. 两个分数相加,若分母不同,则不能直接相加。
()9. 两个互质数的最大公因数是1。
()10. 两个分数相乘,其积一定小于这两个分数中的任意一个。
()三、计算题:1. 计算 4/5 + 1/4。
2. 计算 3/8 1/2。
3. 计算5/6 × 2/3。
2024年人教版四年级上册数学第三单元课后练习题(含答案和概念)试题部分一、选择题:1. 在下列数中,哪一个数是2的倍数?()A. 13B. 15C. 16D. 172. 下列哪个图形不是四边形?()A. 长方形B. 正方形C. 三角形D. 梯形3. 一个数是20的倍数,这个数至少是()。
A. 10B. 15C. 20D. 254. 1000除以8,商是()。
A. 125B. 120C. 130D. 1105. 下列各数中,哪个数是3的倍数?()A. 37B. 38C. 39D. 406. 一个长方形的长是10厘米,宽是5厘米,它的周长是()厘米。
A. 30B. 40C. 50D. 607. 下列算式中,哪个算式是正确的?()A. 6×7=42B. 6×7=49C. 7×6=41D. 7×6=438. 24和36的最大公因数是()。
A. 6B. 12C. 18D. 249. 下列哪个数既是2的倍数,又是3的倍数?()A. 24B. 26C. 28D. 3010. 一个数是4的倍数,也是6的倍数,这个数至少是()。
A. 12B. 16C. 18D. 20二、判断题:1. 一个数如果是2的倍数,那么它的个位数一定是偶数。
()2. 1米等于100厘米。
()3. 一个长方形的长是10厘米,宽是5厘米,它的面积是50平方厘米。
()4. 18除以3的商是6。
()5. 0乘以任何数都等于0。
()6. 9加9再加9的和是27。
()7. 100的因数有10个。
()8. 4的倍数的个位数一定是2、4、6、8。
()9. 36和48的最大公因数是12。
()10. 一个数既是4的倍数,又是6的倍数,那么这个数一定是12的倍数。
()三、计算题:1. 24÷3=2. 45×6=3. 80÷10=4. 63÷9×2=5. 10075=6. 54÷6=7. 35+25=8. 72÷8=9. 900÷30=10. 64÷8×5=11. 250120=12. 81÷9=13. 18+24÷6=14. 500÷100×2=15. 96÷12=16. 120÷40=17. 4518=18. 36+64÷8=19. 9×7=20. 800÷200=四、应用题:1. 小明有30个苹果,他每天吃3个,吃了5天后还剩多少个?2. 一个长方形的长是8厘米,宽是5厘米,求这个长方形的面积。
人教版四年级数学上册第三单元练习题(附答案)一、选择填空题1. 16 ÷ 4 = ?()A. 2B. 4C. 8答案:B2. 20 ÷ 10 = ?()A. 10B. 2C. 12答案:A3. 哥哥一天骑自行车骑了 30 公里,照片每张消耗 2 元,他一共粘了多少张照片?()A. 10B. 15C. 20答案:B4. 张老师去年 6 月份买了 2 条围巾,每条花了 15 元,她一共花了多少元?()A. 20B. 25C. 30答案:C二、判断正误题1. 45 ÷ 9 = 5。
()答案:正确2. 77 ÷ 11 = 6。
()答案:错误3. 我们班有 30 张桌子,5 张桌子为 uncorrect。
()答案:错误4. 5 可以被 1 整除。
()答案:正确三、计算1. 43 ÷ 7 = ?答案:6 余 12. 52 ÷ 6 = ?答案:8 余 43. 93 ÷ 12 = ?答案:7 余 94. 68 ÷ 15 = ?答案:4 余 8四、解决问题1. 一根绳子长 25 米,每次剪下来 2 米,可以剪多少次?答案:可以剪 12 次2. 小华买了 35 枚铅笔,把它们每 5 枚装在一个盒子里,可以装多少个盒子?答案:可以装 7 个盒子3. 妈妈做糖果共用了 1000 克的糖,分成每个糖 5 克,可以做多少个糖果?答案:可以做 200 个糖果4. 食堂有 60 个学生用餐,每桌就餐 6 人,可以排多少桌?答案:可以排 10 桌。
2024年五年级上册英语第三单元基础练习题(含答案)试题部分一、选择题(每题2分,共20分)1. Which word has the same sound as "book"?A. lookB. cookC. mouse2. Choose the correct word to plete the sentence: "I______ to the park every weekend."A. goB. goesC. going3. What is the opposite of "big"?A. smallB. tallC. short4. Which letter makes the "k" sound in "king"?A. cB. kC. q5. Which word is a noun?A. runB. happyC. cat6. Choose the correct form of "be" in the sentence: "They _______ at school."A. amB. isC. are7. What is the past tense of "do"?A. didB. doneC. does8. Which word means "not correct"?A. rightB. wrongC. good9. What is the plural form of "child"?A. childsB. childC. children10. Which word is an adjective?A. eatB. sleepC. beautiful二、判断题(每题2分,共20分)1. "He" and "she" are pronouns. ()2. "Jump" and "run" are both nouns. ()3. The word "and" is a conjunction. ()4. "Cat" and "dog" have the same vowel sound. ()5. "Go" and "went" are the same tense. ()6. "I" is always followed "am". ()7. "Play" is a verb. ()8. "Apple" is a plural noun. ()9. "Sheep" and "fish" have the same plural form as their singular form. ()10. "The" is a verb. ()三、填空题(每题2分,共40分)1. The opposite of "hot" is ________.2. "I _______ a book every night before bed."3. There are seven days in a ________.4. A cat has ________ legs.5. The sun rises in the ________ and sets in the ________.6. "She _______ to the store to buy some milk."7. The ________ is the biggest planet in our solar system.8. "If you _______ hard, you will succeed."9. Apples, oranges, and bananas are all types of ________.10. "He _______ his homework every evening."11. The ________ is the highest mountain in the world.12. "They _______ playing football after school."13. A ________ is a small, soft, furry animal with a long tail.14. "We _______ to the zoo last weekend."15. The ________ is a large, grey animal with a trunk.16. "She _______ her teeth twice a day."17. The ________ is a bird that cannot fly.18. "I _______ a letter to my pen pal yesterday."19. The ________ is a large, slowmoving animal with ahard shell.20. "They _______ a new house in the country."四、简答题(每题5分,共50分)1. What is the capital city of France?2. Explain the difference between a verb and a noun.3. Write a sentence using the word "because."4. What is the past tense of "eat"?5. Name three types of transportation.6. Describe what you do in the morning before going to school.7. What is the main character of your favorite book and why do you like them?8. What is an adjective and give an example.9. Translate the following sentence into English: "Jet'aime beaucoup."10. Explain how to form the plural of a regular noun in English.一、选择题1. B2. A3. A4. B5. C6. C7. A8. B9. C10. C二、判断题1. √2. ×3. √4. ×5. ×6. ×7. √8. ×9. √10. ×三、填空题1. cold2. read3. week4. four5. east, west6. goes7. Jupiter8. work9. fruit10. does11. Everest12. enjoy13. squirrel14. went15. elephant16. brushes17. ostrich18. wrote19. tortoise20. have四、简答题1. Paris2. A verb is a word that describes an action, state, or occurrence, while a noun is a word that represents a person, place, thing, or idea.3. I stayed home because it was raining.4. ate5. Car, train, airplane6. Wake up, brush my teeth, eat breakfast, get dressed, and go to school.7. Harry Potter (example) because he is brave and smart.8. An adjective is a word that describes a noun or pronoun. Example: "The red car is fast."9. I love you very much.10. Add s or es to the end of the word. Example: cat > cats, dog > dogs.。
八年级语文上册第三单元练习题-部编版(含答案)一、积累与运用。
1.解释下列加点的词语。
(1)未复有能与.其奇者(2)不见曦.月(3)但.少闲人如吾两人者耳(4)素.湍绿潭,回清倒影2.下列句子中没有错别字的一项是( )A.怀民亦未寝,相于步于中廷B.天无纤云,月白如昼C.素湍绿潭,回清倒映D.清林翠竹,四时具备3.下列选项中加点词语的意思相同的一项是( )A.自.三峡七百里中自.富阳至桐庐B.山川之.美春冬之.时C.相与步于.中庭冰寒于.水D.天下独绝.猿则百叫无绝.4.下列各句中没有通假字的一项是( )A.素湍绿潭,回清倒影B.两岸连山,略无阙处C.经纶世务者,窥谷忘反D.蝉则千转不穷5.对下列句子的大意理解不正确的一项是( )A.自三峡七百里中,两岸连山,略无阙处。
在三峡七百里之间,两岸(都是)连绵不绝的山峰,完全没有中断的地方。
B.两岸石壁,五色交辉。
两岸悬崖峭壁,五光十色。
C.但少闲人如吾两人者耳。
只是缺少像我们二人这样的闲人罢了。
D.经纶世务者,窥谷忘反。
那些忙于治理政务的官员,看到(这些幽美的山谷)后,(就)流连忘返。
6.根据要求默写。
(1)晴川历历汉阳树, 。
(2) ,山山唯落晖。
(3)春冬之时,则素湍绿潭, 。
(4) ,云生结海楼。
(5)孟浩然从大处入笔,用“气蒸云梦泽,波撼岳阳城”描绘了洞庭湖的壮观景象;白居易则从细处着墨,用“, ”描绘了西湖早春鸟儿欢唱的动态美景。
(白居易《钱塘湖春行》)二、阅读理解。
(一)阅读《三峡》,回答问题。
三峡郦道元自三峡七百里中,两岸连山,略无阙处。
重岩叠嶂,隐天蔽日,自非亭午夜分,不见曦月。
至于夏水襄陵,沿溯阻绝。
或王命急宣,有时朝发白帝,暮到江陵,其间千二百里,虽乘奔御风,不以疾也。
春冬之时,则素湍绿潭,回清倒影,绝多生怪柏,悬泉瀑布,飞漱其间,清荣峻茂,良多趣味。
每至晴初霜旦,林寒涧肃,常有高猿长啸,属引凄异,空谷传响,哀转久绝。
故渔者歌曰:“巴东三峡巫峡长,猿鸣三声泪沾裳。
高一语文必修一第三单元练习题4套(附答案)一、基础巩固1.下列词语中加点的字,每对的读音完全相同的一组是()A.勾当/勾通吐露/露马脚勒索/悬崖勒马B.着落/着想血迹/血淋淋挑剔/痛哭流涕C.削发/剥削关卡/卡脖子攒射/人头攒动D.血泊/停泊馈赠/溃疡病跻身/济济一堂【解析】A项,分别读ɡòu/ɡōu,lù/lòu,lè/lè;B项,分别读zhuó/zhuó,xuè/xiě,tī/tì;C项,分别读xuē/xuē,qiǎ/qiǎ,cuán/cuán;D项,分别读pō/bó,kuì/kuì,jī/jǐ。
【答案】C2.下列词语中没有错别字的一项是()A.预定预订殒灭陨身不恤B.率领帅直惨淡残绝人寰C.和蔼暮霭大概英勇气慨D.缘由原由吭声引吭高歌【解析】A项,“陨”应为“殒”;B项,“帅”应为“率”,“残”应为“惨”;C 项,“慨”应为“概”。
【答案】D3.下列句中加点的词语,使用正确的一项是()A.以糯康为首的犯罪集团与极少数泰国不法军人相勾结制造了耸人听闻的“湄公河惨案”,今年9月,该案在昆明市中级人民法院公开开庭审理,糯康等6名犯罪嫌疑人接受了中国法律的公正审判。
B.当听说积攒了多年的储蓄被丈夫一夜输光后,她从来没有惊心动魄到这样的地步,一下子晕了过去。
C.在电影《落叶归根》里,郭德纲因扮演劫匪操着一口河南腔,险被网友骂得一佛升天二佛出世,“很受伤”的河南人更是出离愤怒,要求郭德纲给个解释。
D.莫言获得诺贝尔文学奖,令中国文学界为之沸腾,真是大快人心。
获得诺奖,是对莫言这么多年的努力,这么多的优秀作品一个极大的肯定。
【解析】A项,“耸人听闻”指故意说夸大或惊奇的话,使人震惊。
应改用“骇人听闻”。
B项,“惊心动魄”指使人神魂震惊。
原指文辞优美,意境深远,使人感受极深,震动极大。
人教版五年级下学期语文第三单元练习一、看拼音,写词语。
rén cái bèi chū yuán yuǎn liú cháng ( ) ( )tiān dì xuán huáng hán lái shǔ wǎng ( ) ( )二、有趣的字谜,我们来猜一猜。
1.哥哥一半大,莫作可字猜。
()2.田里跑到田外,不能当作古字猜。
()3.林字多一半,不当森字猜。
()4.一只狗,两个口,谁遇它,谁发愁。
()三、我知道下列歇后语中加点字的谐音字。
1.秃子打伞——无法无天。
()2.盲人戴眼镜——假聪明。
()3.黄鼠狼钻鸡笼——投机。
()四、按规律填词语。
一尘不染—两败俱伤—()—()—()—六神无主—七上八下—()—九霄云外—()五、下列歇后语的使用有误的一项是()。
A.身体一向很好的王老师生病住院了,同学们想选出三个代表去看望他,大家问班长都选谁。
班长说:“外甥打灯笼——照旧(舅)。
”B.一片好心却把事情办糟了,我真是哑巴吃黄连——有苦说不出了。
C.奶奶的医术可真是“隔着门缝吹喇叭——名(鸣)声在外”啦!连外省的人都辗转奔波来找她治病。
D.奶奶第一次来我家,做饭的时候找不到盐,我对她说:“这不是‘咸菜烧豆腐——有言(盐)在先’吗?您怎么就看不到呢?”六、精彩回放。
1.甲骨文是刻在上的;它出土的地方是现在的。
2.按照顺序写出汉字字体的演变过程:甲骨文——()——()——()——()。
3.形声字分为形旁和声旁,分别代表了字义和读音。
如“星”的形旁是,声旁是。
我还可以写出几个形声字:()、()、()、()。
七、连线。
李耳北宋女词人李清照明代医药学家李时珍中国共产党创始人之一李世民春秋末期思想家李大钊唐太宗八、课外阅读。
汉字与中国心1998年春,在美国纽约,一位美国青年问我:“为什么中国人的凝聚力那么强?”我戏答曰:“第一,我们都吃中餐;第二,我们都讲中文,用汉字。
2024—2025学年度第一学期第三单元练习题五 年 级 语 文【书写展示】一、书写提醒:同学们,把字写工整、美观,保持整洁!二、专项书写。
把下列句子抄写到横格上,注意字的大小和间距,注意标点符号。
分布在银河两侧的牵牛星和织女星,看起来是一“水”之隔,其实距离十分遥远。
人们根据他们的名字,创作出《牛郎织女》这个充满传奇色彩的民间故事。
三、阅读文段,根据拼音写词语。
1.临行之际,q ī zi( ) 再 三 d īng zh ǔ( )他要牢记zh ǎng b èi( )说的话,不做让自己 h òu hu ǐ( ) 的事情。
2.听到大山即将 b ēng t ā( ) 的消息,他内心非常ji āo j í( ), 想回家y ī t àng( ),把这个消息告诉乡亲们。
四、背诵积累,根据语境填完整。
1.《乞巧》一诗中的“乞巧”又名“________________”,传说是牛郎织女鹊桥相会的日子,可以从诗句“_________________________,_____________________________”得知,与其有关的一个民间故事是:______________________;“________________________,___________________________”诗句告诉我们相传这一天女孩子会在庭院间向织女乞求智巧。
2.在本学期口语交际活动“讲民间故事”中,我讲的故事是 ____________________ ,我最喜欢的人物是____________________因为________________________________________________。
3.根据左边的俗语写成语。
吃水不忘挖井人( ) 鼻子都气歪了( ) 打开天窗说亮话( ) 盼星星盼月亮( )五、梳理辨析,根据要求作选择。
1.下列词语中,加点字的读音完全..正确..的一项是( )。
第三单元单元练习(B卷)一、根据拼音写字组成词语。
二、按查字典要求填空。
三、给下面的字换一个部首,组成新字,再组成词。
调()()净()()仗()()偷()()四、在括号里填上恰当的词语。
清理()疏通()整理()疏散()增加()()飘落增添()飘散()五、写出下面词语的反义词。
谦虚——()生气——()幸福——()简单——()冷酷——()寒冷——()六、在括号里填上恰当的词语。
一()泉水一()刻刀一()木头一()告示牌一()水一()灯七、给“收拾”一词选择恰当的解释。
收拾:①整顿、整理②修理③整治④消灭、杀死1.这辆车坏了,请你帮助收拾一下。
()2.他把屋子收拾得干干净净。
()3.这只新来的狗熊被魔术师收拾得服服贴贴的。
()八、选择关联词语,填在括号里。
连……都…………因而……假如……就……越……越……1.()你们十年后,不知道什么是幸福,我()告诉你们。
2.风()刮()大,()对面走过来人()看不清楚。
3.他成绩优异,学习刻苦,()被评为学习标兵。
九、用修改符号修改下列病句。
1.李华改正了学习方法后,学习成绩提高得很快。
2.我们一定能够战胜一切任何困难。
3.我们班同学基本上都参加秋游活动。
十、排列错乱句子的顺序。
()有黄色带红斑点的凤凰花,样子就像传说中的凤凰。
()西双版纳是花的海洋。
()它早上是白色,中午变成蓝色,到晚上又变成紫色了,十分奇妙。
()不但有芍药、美人蕉、紫罗兰,还有许多奇花异草。
()还有一种圆形的小花,傣族人叫它“浴至飘”。
十一、给下面的句子加标点。
1.我问孩子请告诉我你知道小明去哪儿了吗2.我为你们的幸福干杯仙女微笑着说3.你们好吗孩子们那美丽的姑娘说4.我可以喝你们这里的水吗十二、读下面的短文,按要求完成作业。
小猴子比本领动物运动会上,小猴荣获爬竿冠军。
在回家的路上,小猴一会儿拍拍小松鼠的肩膀,一会儿向小白兔眨眨眼睛,意思是说,瞧,我的本领多大呀!这时,路边有一位姑娘喊道:“小猴,你说爬竿的本事比谁都强,这里有根竹竿,你来爬爬看!”小猴子这才注意到,在那位姑娘旁边,确实有筷子般大小的细竹竿。
全新版精读Unit 3 Text A Text Organization 1.2.VocabularyI. 1. 1) generously2) physically3) structure4)partition5) blurted out6)chuckling7) pried8)prospective9) jet10)sparkled11) took a crack at12)partner13) made a (big) difference14)beyond his wildest dream.15) employment2. 1) go after2)look back on/at3) be put up4)count on5) was handed down6) follow up7) bring about8) broke into3. 1) Mary's parents grilled her about where she had been all night.2)In order to meet the deadline, we worked 48 hours without sleep and finally made it.3)The translation of the popular novel has just finished and a Chinese version will bein readers' hands soon.4)As with anything else, it is important to do your homework before going on aninterview.5)Jim's car broke down last week and the repair cost was in the neighborhood of 150dollars.4. 1) The director of the Urban Development Office will interview the two localapplicants, as well as the two other candidates recommended by the staff committeethis afternoon, to pick out the prospective designer for the construction of the citysquare.2)In the endeavor to clean up the river before the deadline set for this importantmunicipal project, the project manager has tried every possible means to go afterthe best engineers for the work.3)Time is money, as the saying goes. People in my age bracket often want to have acrack at everything new, but they just cannot afford the time and energy.II. Words with Multiple Meanings1.When in Rome, do as the Romans do. (behave)2.Richard suggested I keep all my friends' addresses on my computer, as he does his.(used to avoid repetition)3.Elizabeth told her daughter that if she did the bathroom, the kitchen and the livingroom, she would get $10.00 every week. (clean)4.Since the Smiths' business is doing well, they are thinking of starting a similar type ofbusiness in Canada. (get along)5.If you are prepared, you can certainly do the job. (perform or complete <a job>)6.Knowing what you cannot do is more important than knowing what you can. (performor complete <an action or a job>)7.When I asked John why he does philosophy, he said that he does it simply because he findsit interesting. (study)8. A small piece of cake will do for me, thanks. (be enough)9.Leisure is a beautiful garment, but it will not do for constant wear. (be acceptable)III. Usage1.There is so much to say and it is hard to know where to begin. OK, I'll talk about myselffirst.2.Thank you very much, John, for your beautiful Christmas card. By the way. I havesomething here for you.3.The new computer language can be quite easily understood by anyone who can read thedaily newspaper. Now, why is this an advantage?4.I'm going to work out the outline and will let you know how it goes. By the way. I willsee you in February, as I plan to attend your seminar in Shanghai.5.OK, you got the job. Now, how to maximize your profits with as little effort as possible?6.Chris has been back from Australia. Incidentally, those pictures you sent me arewonderful.Structure1. 1) As I see it / From my standpoint / In my opinion, the institution needs bettermanagement rather than more money.2)As I see it / From my standpoint / In my opinion, our schools have focused on tests tosuch an extent that the students hardly have any time left to participate in creativeactivities.3)From my standpoint / As I see it / In my opinion, we can't judge people by appearanceonly, because clothes don't always reflect someone's personality.4)From my standpoint / As I see it / In my opinion, talent just comes from doingsomething often enough.2. 1) Sleep is a never ending task that has to be done at least once every couple of days, if noteveryday.2) As I see it, pre-school children who are taught at home by their parents do at least as wellas, if not better than, those educated at nursery schools.3)It is difficult, if not impossible, for most people to think otherwise than in the fashion of theirown period.4)I have reasons to believe that most applicants, if not all of them, will have done their home-work before the interview.Comprehensive ExercisesI. Cloze1. prospective 3. As I see it 5. endeavor 7. take a crack 9. employment11. make a difference (B) 1. matter 2. to3. not4. possible5. can6. interview7. ask8. copies9. If 10. preparing 11. what 12. kinds 13. take 14. Prior 15. whether16. fitSection A Vocabulary III. 1. mutual 2. illusion 3. canceled4. overlooked5. proceeded6. resolve7. prejudice8. compromise9. confirm10. subsequentlyIV.1. have nothing to do with2. taking care of3. met with4. on the surface5. work out6. incompatible with7. ups and downs8. learned of9. indication of10. all alongV. 1. M 2. L3. F4. D5. H6. O7. A8. C9. I10. KWord Building2. interview4. done your homework 6. structure8. from the standpoint 10. deadline 12. follow up1. shopping2. feeling3. storage4. cooking5. ending6. beginning7. gathering8. removal9. arrival 10. passage 11. writing 12. marriageVII.1. relationship2. citizenship3. leadership4. membership5. boyhood6. livelihood7. brotherhood8. authorship9. adulthood 10. neighborhood 11. wisdom 12. ownershipSentence StructureVIII.1.It is never too bad (for us) to do something about the situation.2.One is never too old to learn.3.It is never too late (for you) to put a stop to this madness.4.It is never too late (for you) to mend your ways.5.His income was never too small to support his family.IX.1.My best friend, Anna, was here last night.2.The company manager, Mr. Madison, gathered his staff and announced the decision.3.You should have seen an ophthalmologist, an eye doctor.4.He sent for the accountant, the most experienced person in accounting.5.“Leave it to me,” said David, the man on night duty.TranslationX.1. You are never too experienced to learn new techniques.2. There remains one problem, namely, who should be sent to head the research there.3. Their relationship did meet with some difficulty at the beginning because of cultural differences.4. Though he has had ups and downs, I believed all along that he would succeed someday.5. I have some reservations about the truth of your claim.6. She isn’t particularly tall, but her slim figure gives an illusion of height.XI.1.应尽早告知年轻人:必须认真对待法律。