补充练习2
遗传学补充练习（有答案）
遗传学补充练习题第二章遗传的细胞学基础1．水稻的正常的孢子体组织，染色体数目是12对，问下列各组织的染色体数目是多少？（1）胚乳；（2）花粉管的管核；（3）胚囊；（4）叶；（5）根端；（6）种子的胚；（7）颖片；2．用基因型Aabb的玉米花粉给基因型AaBb的玉米雌花授粉，你预期下一代胚乳的基因型是什么类型，比例如何？3．蚕豆的体细胞是12个染色体，也就是6对同源染色体（6个来自父本，6个来自母本）。
一个学生说，在减数分裂时，只有1/4的配子，它们的6个染色体完全来自父本或母本，你认为他的回答对吗？4．在玉米中：（1）5个小孢子母细胞能产生多少配子？（2）5个大孢子母细胞能产生多少配子？（3）5个花粉细胞能产生多少配子？（4）5个胚囊能产生多少配子？5．马的二倍体染色体数是64，驴的二倍体染色体数是62。
（1）马和驴的杂种染色体数是多少？（2）如果马和驴之间在减数分裂时很少或没有配对，你是否能说明马-驴杂种是可育还是不育？6．在玉米中，与糊粉层着色有关的基因很多，其中三对是A—a，I—i，和Pr—pr。
要糊粉层着色，除其他有关基因必须存在外，还必须有A基因存在，而且不能有Ⅰ基因存在。
如有Pr存在，糊粉层紫色。
如果基因型是prpr，糊粉层是红色。
假使在一个隔离的玉米试验区中，基因型AaprprII的种子种在偶数行，基因型aaPrprii的种子种在奇数行。
植株长起来时，允许天然授粉，问在偶数行生长的植株上的果穗的糊粉层颜色怎样？在奇数行上又怎样？（糊粉层是胚乳一部份，所以是3n）。
8．兔子的卵没有受精，经过刺激，发育成兔子。
在这种孤雌生殖的兔子中，其中某些兔子对有些基因是杂合的。
你怎样解释？（提示：极体受精。
）第四章孟德尔遗传1．下面是紫茉莉的几组杂交，基因型和表型已写明。
问它们产生哪些配子？杂种后代的基因型和表型怎样？（1）Rr × RR（2）rr × Rr（3）Rr × Rr粉红红色白色粉红粉红粉红2．在南瓜中，果实的白色（W）对黄色（w）是显性，果实盘状（D）对球状（d）是显性，这两对基因是自由组合的。
高考语文标点符号补充练习(二)
标点符号补充练习（二）1、下列各句中，标点符号使用正确的一句是（）A．她认真看过这些信后，郑重地转给了有关部门，不知道有关部门收到这些信后作何感想?能不能像影片中那位女法官那样秉公断案，尽快解决问题?B．以前可能因为年龄小，不知道珍惜时间，现在我才体会到“一寸光阴一寸金，寸金难买寸光阴。
”这句话的真正含义。
C．每当疼痛发作，他就采用自己的“压迫止痛法”——用茶壶盖、烟嘴、玻璃球、牙刷把……顶住疼痛部位。
D．“真不是和你说着玩儿，”洪民一本正经地说，“如果你能出山，咱们一起想办法，这事准能完成”。
2、下列各句中，标点符号使用正确的一句是（）A. 美国的纽约、洛杉矶、日本的东京、法国的巴黎、英国的伦敦、中国的北京、上海，都是世界上著名的特大城市，都有申办奥运的实力。
B. 位居2003年度“《新财富》400富人榜”第5位的刘永行，以生产饲料起家，拥有35亿元的身价。
（见《新财富》2004年第3期）C. 老师鼓励我说：“你要学习鲁迅‘横眉冷对千夫指，俯首甘为孺子牛’的精神，全心全意为人民工作”。
D. 现在的高三学生学习任务比较重，他们每天的睡眠时间只有五、六个小时，其余的时间几乎都花在学习上。
3、下列各句中，标点符号使用正确的一句是（）A.天津歌舞剧院青年女高音歌唱家张鹤将在天津音乐厅举办“永恒的记忆——“‘美丽中国，青春之歌’公益音乐会”。
B.连日来，记者走访发现，由于受到一些质量不达标的有机食品的形象，原来一度销售红红火火的有机蔬菜、水果、杂粮、肉制品等……，目前在一些卖场已经大大减少，有些甚至已经下架。
C.鲁尼当之无愧成为本场最佳球员，欧足联官方盛赞：“不鸣则已，一鸣惊人，凭借这个帽子戏法，鲁尼已经是队内最佳射手，他在一次赢得全世界喝彩”！D.蓟县下营镇常州村、穿芳峪镇毛家峪村、官庄镇砖瓦窑村、渔阳镇东果园村等18个旅游特色村被命名为《中国乡村旅游模范村》4、下列句子标点符号使用正确的一项是（）A．媒体报道：“我国空气净化器性能测评结果宣称的‘去除甲醛功能’基本无效”。
高级口译翻译补充练习2答案
高级口译翻译补充练习2答案1．其实，全球后工业化过程中，看看上海浦东、吉隆坡双子塔和美国世贸废墟等为“第一高楼”争得打破头，看看一幢楼里一模一样的房子高一层即贵一万元，便可明白人类这种登高望远的野心。
即使“上九天揽月”也不再是嫦娥或库布里克的奥德赛之梦了，从加加林的首航和阿姆斯特朗的“一小步”，到美国富翁狄托那次昂贵却货真价实的太空旅游，人类才花了二十几年。
据说两年内将启动的Sub-Orbital Flights子轨道飞行，每人只需5万美金就可以预定座位了。
如果张雨生还活着的话，想去月球他就去吧。
《不远行者没有未来》译文：In fact, it is quite easy to understand the wish of human being “to be the highest” when we see the fierce competition for the “highest one” among the high buildings in Pudong, the Twin Tower in Kuala Lumpur, and the ruins of the World Trade Center, or when we are shocked by the sharp increase in price for the same houses at different stories in a building. To travel in the outer space is not longersomething absolutely impossible--- it only after 20 years later since Gagarin’s first navigation in the outer space and Armstrong’s “little step” there that Ditto, an American rich man, took his expensive but real travel in space. It is said the Sub-Orbital Flights Subtrack Flight to be launched within 2 years will only charge 50 thousand dollars for the reservation from each passenger. If Zhang Yusheng, a famous singer in China, was still alive, he could realize his dream of visiting the moon.2．有观点就必然有差异，即使是不同的声音在媒体中也都拥有了发表的空间（凤凰卫视的《时事辩论会》节目中，拥战派和反战派的嘉宾就吵得不亦乐乎）。
八年级物理补充习题(共10篇)
八年级物理补充习题(共10篇)八年级物理补充习题（一）: 物理补充习题八上答案苏科版苏教版八上物理补充习题第一章本章练习答案一、1、B 2、 C 3、C 4、 D 5、 A 6、D 7、 C二、8、次声波振动 9、振动液体 10、空气固体 11、噪声堵住耳朵、关闭房门 12、固体声音会四处传播 13、空气音色 14、人耳声源三、15、（1）声音能否在空气中传播(2)声音的想读能否与物体震动幅度有关（3）声音的高低与频率有关、（4）固体能否传声16、（1）手机音叉要敲,才能发出声音.力度大,声大.力度小,声小.（2）B 站在一定距离,可能声音差不多,不容易比较.17、（1) 弦的材料（2）A B (3) 用示波器八年级物理补充习题（二）: 苏科版 2023秋物理补充习题八上答案一定要是2023年秋的!急啊~~~~补充习题首页八年级物理补充习题（三）: 物理试题（八年级）及答案1、（）关于声现象,下列说法不正确的是：A、医生利用“B超”给病人做检查,是利用了声音可以传递信息.B、超声波声音响度太大,所以人听不见.C、男低音独唱时由女高音轻声伴唱,则男低音比女高音的音调低,响度大.D、振动停止,发声也停止.2、（）一束光线从空气射入水面,当入射角减小时：A、反射角和折射角都增大.B、反射角和折射角都减小 .C、折射角增大,反射角减小.D、折射角减小,反射角增大.4、（）下列现象中,属于光的折射的是：A、立竿见影.B 、群山在河水中的倒影.C、水中月.D 、人看到鱼缸中变大的鱼.5、（）幻灯机的镜头相当于一凸透镜,在放映幻灯时,为了使观众能从屏幕上看到正立的像,幻灯片应放在离镜头：A、大于2倍焦距处,倒立放置.B 、2倍焦距和焦距之间,倒立放置.C、2倍焦距和焦距之间,正立放置.D、大于2倍焦距处,正立放置.8、（）下面是小聪同学收集的一些社会上对他人、社会、环境造成危害的物理活动的例子,其中有一条选错了,请你把它找出来：A、挖掘隧道时,用激光准直.B、用紫外线检验假币C、有的高楼大厦的外墙贴着像镜子一样亮的玻璃砖D、用红外线夜视仪观察敌军的情况10、（）在研究光现象时,我们常用光线画出光路图表示光的传播情况,这种研究方法在物理学中称为：A、比较法B、转换法C、模型法D、控制变量法17、一个神枪手站在池塘边,对放在正前方水中不动的鱼靶射击,要射中鱼,他应怎样答：应对准鱼靶的射击.这是因为,由于光的折射,水中鱼靶反射的光,在发生折射,折射光线法线进入枪手眼中,他逆着折射光看到的是 ,而真正的鱼靶在 ,所以他应这样做.18、黑板“反光”,为什么看不清字答：这是由于黑板发生了反射的缘故.黑板面变得 ,把平行射来的太阳光反射向方向,使这个方向上的光太强.而粉笔字表面 ,太阳光照射到粉笔字上发生反射,向各个方向上的光都很弱,因此,使黑板“晃眼”,看不清字.0.5 0.6 下落的高度泡沫塑料球的体积大小下落的高度体积越大八年级物理补充习题（七）: 八年级上学期物理电流和电路的习题1．为什么不允许把电流表接在电源两端2．电流表在使用前要不要检查指针是否对准零刻度线,如果指针在零刻度线偏右处,而不进行校正,测量结果比实际数值偏大还是偏小四、做一做 (每题4分,共20分)1．如图10所示：箭头表示接好电路时的电流方向,请在A、B、C、D四处分别填入电源、电动机、电灯和电流表,要求电流表测通过电灯的电流．图102．如图11,在电路的“○” 处填入两个灯泡,两个电流表,并标出电流表的“+”“-”接线柱和电源的正负极．图113．如图12所示的电路中,有两根导线尚未连接,请用笔画线代替导线补上,补上后,要求：两灯都能发光；电流表测通过灯L1的电流；开关只控制灯L2．图124．请用笔画线代替导线,将图13中的实物连成电路,要求：二灯并联,电流表只测通过L1的电流．图135．画出图14所示的实物电路的电路图：图14五、小调查(5分)请你仔细观察你家中的电子门铃和手电筒的连接电路,并分别画出电路图．八年级物理补充习题（八）: 八年级物理上册电路图练习题闭合S1时L1亮L2不亮,闭合S2L1不亮L2亮,闭合S3都不亮,任意闭合两个或3个开关,2个灯泡都亮,画出电路图八年级物理补充习题（九）: 求八年级上册物理电路练习题第五章电流与电路全章复习题测评试卷A 一、填空题:1.有些化纤布料做成的衣服穿在身上很容易脏,这主要是因为化纤布料容易发生 ________ 现象而吸引细小的灰尘所造成的 2.城市中的路灯是联在一起的；家庭中的用电器都是联在一起的；圣诞树上使用的“满天星”小彩灯是联的.3．某同学用电流表测量电流时,发现电流表指针反偏,这是因为 _________________________________ ______；另一位同学发现电流表指针偏转到右边没有刻度的地方,这是因为 _________ .4．房间灯泡中的电流约是0.2 A,等于_____mA.5．电路中提供电能的装置是_____,利用电流来工作的装置是____ _,控制电流通断的装置是_____,用来连接电路、提供电流流动路径的是_____.6．电流表是测量电路中__ 的仪器,用符号____表示,电流表的测量范围叫电流表的____,实验室里常用的电流表的测量范围有两个,分别为_____和_____．如果测电流前,估计所测电路中的电流约为0．4 0．5 A,测量时,应选用的量程,这样测得的结果较为准确.7．两个小灯泡首尾相连,然后接到电路中,我们说这两个灯泡是_____联的,两个小灯泡的两端分别连在一起,然后接到电路中,我们说这两个灯泡是_____联的,如图5-1所示,两个小灯泡是_____联的.8．如图5-2所示,要使两灯并联在电路中,应闭合的开关是_____,使两灯串联在电路中,应闭合的开关是_____.9．如图5-3,导线A处直径大于B处,如果通过导线A的电流为I1,通过导线B的电流为I2,则它们的大小关系是I1_____I2.（选填“”或“＝”） 10．一些城市道路上的红绿灯和用来显示数字用的数码管都是用___ _制成的,电流能从它的一端流向另一端,_____(填“能”或“不能”)反向流动.八年级物理补充习题（十）: 我们生活的地球是太阳系里一颗相对很小的行星.太阳系除了太阳这个唯一的恒星八年级下的补充习题(1)4.17h(2)88(3)金（4）距离太阳系越远的星球,公转周期越大。
Chapter 16.补充练习2 (限定词与名词搭配)
第16章限定词（补充练习2）Choose an appropriate determiner to fill in each blank.B1. Why is there ________ traffic on the streets in February than in May?A. lessB. fewerC. fewD. littleA2. On account of the typhoon ________ shipment will arrive this week.A. neitherB. allC. bothD. theseB3. They paid ________ money for the machine than I expected.A. littleB. lessC. muchD. fewerD4. There are trees on ________ side of the street.A. such aB. bothC. someD. eachB5. Have you got ________ copies to go round?A. the otherB. enoughC. a littleD. muchC6. I saw ________ cars outside the building.A. a littleB. anyC. lots ofD. neitherD7. There’s ________ water in the bottle.A. fewB. a number ofC. plenty ofD. anyC8. I’d like ________ paper.A. a fewB. severalC. a bit ofD. theseD9. There are ________ mistakes in the paper.A. theB. a littleC. muchD. a fewB10. Do they have ________ air-conditioners for cooling the rooms in summer?A. many aB. enoughC. a great deal ofD. a bit ofC11. There is ________ iron in this mine than in that one.A. muchB. a great deal ofC. lessD. a lot ofA12. ________ work has to be done before the plan goes into operation.A. MuchB. DoubleC. A number ofD. NeitherD13. There must be ________ empty talk but more hard work.A. fewerB. noC. the leastD. lessB14. He has published ________ short stories in English.A. a great amount ofB. a number ofC. anotherD. many a D15. The students spent ________ their time working in the fields.A. bothB. mostC. moreD. half。
五年级下册数学补充习题配套课件-1.12整理与练习2 - 共11张PPT
3.一块三角形菜地的面积是80平方米，高是20米。这块三 角形菜地的底是多少米？
解：设这块三角形菜地的底是x米 x×20÷2=80
x=80×2÷20
x=8
答：这块三角形菜地的底是8米。
4.李大伯用64米长的篱笆围了一块长方形的菜地。如果这 块菜地的长是19米，那么它的宽是多少米？
解：设x秒后小颖比小婷多跑一圈
6x－4x=200 2x=200 x=100 答：100秒后小颖比小婷多跑一圈。
解：设它的宽是x米
19×2＋2x=64 2x=26 x=13
答：长方形菜地的宽是13米。
5.一种演出服的价格如下图。张老师为合唱队的同学购买若干套这
样的演出服，一共用去960元。你知道张老师一共购买了多少套吗？ 解：设张老师一共购买了x套演出服
68x＋52x=960 120x=960 x=8
答：张老师一共购买了8套演出服。
1.12整理与练习（2）
苏教版五年级下册配套 补充习题
1.解方程
① 36x+5x=123 解： 41x=123
x=3
② 3.5x－1.5x=10.8 解： 2x=10.8 x=5.4
1.解方程
③ 2x－3.8＋4.2=10
解：
2x＋0.4=10
2x=9.6
x=4.8
④ 4x＋8×1.2=36 解： 4x＋9.6=36
4x=26.4 x=6.6
1.解方程
⑤ 8x－16×0.5=32
解：
8x－8=32
8x=40
x=5
⑥ 18＋29＋6x=95 解： 47＋6x=95 6x=48 x=8
பைடு நூலகம்
第四讲：词汇知识补充与四级真题练习2.doc
第四讲：词汇知识补充与四级真题练习2一、字形相近派生词classic, classicalcomparative, comparablecompetent, competitiveconcerned, concerningconfident, confidant, confidentialconsiderate, considerable, consideringcredible, credulouselectric, electricaleconomic, economicalemergence, emergencyhealthful, healthyhistoric, historicalhonorable, honoraryimaginary, imaginativeindustrial, industriousinstallation, installmentliterary, literate, literalmomentous, momentaryobservation, observancephysicist, physicianrespective, respectable, respectfulsensible, sensitive, sensoryspirited, spiritualtasty, tastefultemporal, temporaryvisual, visible二、拼写形近词adapt, adopt, adeptalter, altaraltitude, latitudeangel, angleaffect, effect;complement, complimentcounsel, council, consuldessert, desertdiner, dinnerdual, duelethics, ethnicsfork, folkflour, floweridle, idolirritate, irrigatelesson, lessenmassage, messagepeer, pearpetrol, patrol, petrelpiston, pistolpray, preypreposition, propositionstationary, stationeryvocation, vacationhuman, humanesuit, suitepremier, premieremoral, moraleheroin, heroine三、特殊拼写absorb-absorption compare-comparison destroy-destruction explain-explanation proclaim-proclamation pronounce-pronunciation repeat-repetition prevail-prevalence reveal-revelation example-exemplify distinguish-distinct extinguish-extinct consume-consumption simple-simplicity pursue-pursuit buy-purchasebite-bait contain-content furnish-furniture benefit-beneficial abolish-abolition diminish-diminution四、搭配Noun + Prepdesire forevidence forgift forreason forhave a good reputation for have a preference for access toanswer toapproach tobarrier toentry tokey toresponse toreaction tosolution tothreat tocomment oneffect onfocus oninfluence onimpact onimpression onremark onbias against discrimination against prejudice against problem withtrouble withattitude towardAdjective + Prep be anxious aboutbe arrogant about be concerned about be crazy aboutbe curious aboutbe enthusiastic about be particular aboutbe amazed atbe astonished atbe delighted atbe disappointed at be dismayed atbe furious atbe good atbe skilled atbe bound forbe competent forbe eager forbe famous forbe fit forbe grateful forbe indispensable for be noted forbe notorious forbe ready forbe suitable forbe sympathy for be well-known forbe afraid ofbe ashamed ofbe aware ofbe capable ofbe cautious ofbe certain ofbe confident of be conscious of be envious ofbe fearful ofbe fond ofbe full ofbe guilty ofbe ignorant ofbe independent of be innocent ofbe jealous ofbe proud ofbe scarce ofbe short ofbe sure ofbe suspicious of be tired ofbe weary ofbe worthy ofbe different frombe distinct frombe free frombe alert tobe beneficial tobe comparable tobe equal tobe essential tobe faithful/loyal to be hostile tobe identical tobe immune tobe inclined tobe indifferent tobe inferior/superior to be opposed tobe parallel tobe peculiar tobe prone tobe proportional tobe relevant tobe sensitive tobe similar tobe subject tobe vital toprior toprevious tobe compatible with be consistent with be content withbe familiar withbe fed up withbe generous with be patient withbe popular withbe satisfied withbe harsh onbe intent onbe keen onVerb + Prep complain about inquire aboutbe confused aboutdiscriminate against fight against insure againstaim atgaze atglance atglare atknock atlaugh atpeer atsmile atstare atbenefit fromderive fromdiffer/differentiate fromdistinguish fromdistract fromdraw fromescape fromextract fromfree fromisolate fromlearn fromoriginate fromprevent/prohibit/inhibit/restrain/stop/keep/dissuade/preclude sb from doing protect fromrecover fromremove fromretire fromseparate fromshift/switch/range from toshield fromstem fromsuffer fromtell fromadapt/adjust/accustom oneself toadd toadhere tobe attached toattribute/ascribe/owe sth to sb be committed tobe connected tobe doomed/destined tobe related tobe/get used/accustomed to cater tocling toconfine/limit/restrict to conform tocomply tocontribute/dedicate/devote to go back tolink toobject tooccur tooppose toresort/turn torespond tostick totrace toyield tobase sth onconcentrate/center/focus on sth congratulate sb oncount ondepend on/upondecide oninsist onoperate onreflect on/uponrely onspend onassociate withbe faced withbe confronted with be infected withbe obsessed with begin/start with bless sb with coincide with combine with endow sb with furnish with interfere with meddle withmeet withreplace withcompensate for exchange/trade sth for long formourn for/over qualify forscold/blame sb for sth substitute sth for yearn foraccuse sb of sth approve sb of sth assure sb of sth convince sb ofdeprive sb of sthinform sb of sthnotify sb of sthremind sb of sthrob sb of sthsuspect sb of sthwarn sb of sthassist inbelieve inbe absorbed/engrossed in be involved inbe located/situated in break inengage inlie inmajor inparticipate inpersist inspecialize insucceed inbe proud oftake pride inbe confident ofhave confidence inbe faithful tohave faith inbe full offill withapply for/tobe concerned about/withcompare with/toconsist in/ofdeal with/indwell on/inresult in/fromat/with ease五、同义词辨析acquire, getaffect, effectappointment, datebelongings, possession, propertychoose, selectcompare, contrastcommon, ordinary, averageclient, customeroccupation, profession, careerowing to, due to, thanks toquestion, problem, issueraw, crude, originalrealistic, practicalsteady, stablevalid, efficient, effective四级真题练习1. First published in 1927, the charts remain an ______ source for researchers.A) intelligent B) indispensable C) inevitable D) identical2. There is a _____ of impatience in the tone of his voice.A) dot B) hint C) notion D) phrase3. Deserts and high mountains have always been a ______ to the movement of people from place to place.A) jam B) barrier C) fence D) prevention4. Joe is not good at sports, but when it ____ mathematics, he is the best in the class.A) comes up to B) comes around to C) comes to D) comes on to5. Please ______ dictionaries when you are not sure of word spelling or meaning.A) search B) seek C) inquire D) consult6. Critics believe that the control of television by mass advertising has _____ the quality of the programs.A) affected B) effected C) lessened D) declined7. She keeps a supply of candles in the house in case of power _____.A) drop B) lack C) failure D) absence8. For more than ears, we've been supporting educational programs that _____ from kindergartens tocolleges.A) spread B) shift C) move D) range9. I was so _____ in today's history lesson. I didn’t understand a thing.A) confused B) neglected C) amused D) amazed10. I must congratulate you _____ the excellent design of the new bridge.A) with B) at C) on D) of11. Now that spring is here, you can _____ these fur coats till you need them again next winter.A) put over B) put off C) put down D) put away12. I went along thinking of nothing _______ only looking at things around me.A) in brief B) in doubt C) in harmony D) in particular13. In order to make things convenient for the people, the department is planning to set up some _____ shopsin the residential area.A) flowing B) mobile C) drifting D) Unstable14. The lecture which lasted about three hours was so ____that the audience couldn't help yawning.A) tedious B) clumsy C) bored D) tired15. It ____ you to at least 50% off the regular price of either frames or lenses when you buy both.A) credits B) entitles C) presents D) tips16. When carbon is added to iron in proper ____, the result is steel.A) rates B) densities C) proportions D) thicknesses17. Doctors warned against chewing tobacco as a _____ for smoking.A) succession B) substitute C) revival D) relief18. The board of the company has decided to _____ its operations to include all aspects of the clothing business.A) multiply B) stretch C) lengthen D) expand19. The test results are beyond _____; they have been repeated in labs all over the world.A) conflict B) dispute C) bargain D) negotiationHis business was very successful, but it was at the _____ of his family life.A) exhaustion B) consumption C) credit D) expense21. Though she began her _ by singing in a local pop group, she is now a famous Hollywood m ovie star.A) employment B) career C) occupation D) profession22. Considering your salary, you should be able to at least twenty dollars a week.A) put forward B) put up C) put out D) put aside23. Mrs. Morris's daughter is pretty and _ , and many girls envy her.A) slender B) light C) faint D) minor24. Salaries for positions seem to be higher than for permanent ones.A) legal B) optional C) voluntary D) temporary25. Science and technology have in important ways to the improvement of agricultural production.A) attached B) assisted C) contributed D) witnessed26. He never arrives on time and my is that he feels the meetings are useless.A) preference B) conference C) inference D) reference27. Only those who can to lose their money should make high-risk investments.A) maintain B) sustain C) endure D)afford28. The writer was so ______ in her work that she didn’t notice him enter the roomA) absorbed B) abandoned C) focused D) centered29. Actually , information technology can ______ the gap between the poor and the rich .A) link B) break C) ally D) bridge30. Mass advertising helped to _______ the emphasis from the production of goods to their consumptionA) vary B) shift C) lay D) moderate31. Because of his excellent administration , people lived in peace and _____ and all previously neglected matters were taken care of .A) conviction B) contest C) consent D) content32. Showing some sense of humor can be a(n) _______ way to deal with some stressful situationA) effective B) efficient C) favorable D) favorite33. The native Canadians lived in _______ with nature , for they respected nature as a provider of lifeA) coordination B) acquaintance C) contact D) harmony34. For professional athletes , _______ to the Olympics means that they have a chance to enter thehistory booksA) access B) attachment C) appeal D) approach35. All the arrangements should be completed _______ your departure.A) prior to B) superior to C) contrary to D) parallel to36. It is said in some parts of the world, goats, rather than cows, serve as a vital _____of milk.A) storage B) reserve C)resource D)source37. It's good to know that quite a few popular English expressions actually _____ from the Bible.A) acquire B) obtain C) derive D) result38. It's very _____ of you not to talk aloud while the baby is asleep.A) concerned B) careful C) considerable D) considerate39. There is no _____ evidence that people can control their dreams, at least in experimental situations in alab.A) rigid B) solid C) smooth D) harsh40. Some plants are very _____ to light; they prefer the shade.A) sensible B) flexible C) objective D) sensitive。
课外补充阅读练习2
课外补充阅读练习2Even if all the technical and intellectual problems can be solved, there are major social problems inherent in the computer revolution. The most obvious is unemployment, since the basic purpose of commercial computerization is to get more work done by fewer people. One British study predicts that “automation-induced unemployment” in Western Europe could reach 16% in the next decade, but most analyses are more optimistic. The general rule seems to be that new technology eventually creates as many jobs as it destroys, and often more. “People who put in computers usually increase their staffs as well” says CPT’s Scheff. “Of course,” he adds,“one industry may kill another industry. Tha t’s tough on some people.”Theoretically, all unemployed workers can be retrained, but retraining programs are not high on the nation’s agenda (议事日程). Many new jobs, moreover, will require an ability in using computers, and the retraining needed to use them will have to be repeated as the technology keeps improving. Says a chilling report by the Congressional Office of Technology Assessment: “Lifelong retraining is expected to become the standard for many people. “There is already considerable evidence that the school children now being educated in the use of computers are generally the children of the white middle class. Young blacks, whose unemployment rate stands today at 50%, will find another barrier in front of them.Such social problems are not the fault of the computer, of course, but a consequence of the way the American society might use the computer. “Even in the days of the big, main-frame computers, when they were a machine for the few.” says Katherine Davis Fishman, author of The Computer Establ ishment, “it was a tool to help the rich get richer. It still is to a large extent. One of the great values of the personal computer is that smaller firms, smaller organizations can now have some of the advantages of the bigger organizations.”1. The close st restatement of “one industry may kill another industry” (at the end of Para. 1) isthat ______________.A) industries tend to compete with one anotherB) one industry might be driven out of business by another industryC) one industry may increase its staff at the expense of anotherD) industries tend to combine into bigger ones2. The word “chilling” (Para. 2, Line 4 most probably means ________.A) misleading B) convincingC) discouraging D) interesting3. Which of the following is NOT mentioned in the passage?A) Computers are efficient in retraining unemployed workers.B) Computers may offer more working opportunities than they destroy.C) Computers will increase the unemployment rate of young blacks.D) Computers can help smaller organizations to function more effectively.4. From the passage it can be inferred that ________.A) all school children are offered a course in the use of computersB) all unemployed workers are being retrainedC) retraining programmes are considered very important by the governmentD) in reality only a certain portion of unemployed workers will be retrained5. The major problem discussed in the passage is ________.A) the importance of lifelong retraining of the unemployed workersB) the social consequences of the widespread use of computers in the United StatesC) the barrier to the employment of young peopleD) the general rule of the advancement of technology。
人教版小学数学二年级上册周末练习卷(第2周)
湖头中心学校2021年秋二年级数学课内补充练习（第2周）班级：姓名：座号：
一、填一填。
1.测量铅笔的长度用()作单位比较合适;测量床的长度用()作单位比较合适。
2.
油画棒长()厘米。
3.2米=()厘米300厘米=()米
30厘米-6厘米=()厘米45厘米+20厘米=()厘米
4.甜甜的身高是90厘米,再长()厘米,她的身高就是1米。
二、辨一辨。
1.下面哪些图形是线段?在下面画“√”。
2.下面图形中各有几条线段?
三、在括号里填上合适的长度单位。
亮亮身高120（）教室长5（）杯子高10（）长颈鹿高3（）
课桌高80（）跳绳长大约3（）床长2（）楼高30（）
四、做一做。
1.量出下面线段的长度。
2.画一条5厘米长的线段。
五、解决问题。
1.你知道蚯蚓的身体有多长吗?
2.有一根绳子,剪去30厘米后,还剩70厘米。
这根绳子原来长多少米?
3.一栋楼高59米，另一栋楼房高42米，两栋楼房高度相差多少？
*智慧大闯关
下图有（）条线段
二年级的林林领着妹妹去放风筝，风筝不小心落在了一棵高6米的树上。
他们找来了一根长2米和一根长3米的竹竿。
问：他们能把风筝取下来吗？。
1、2、5补充练习
Supplementary PracticesUnit 1Practice 1.1 TerminologyChoose the best for each of the following.1. The prefix dys as in the word dysfunction means .A. 不能B. 没有C. 除去D. 异常2. The compound suffix gnosis as in the word diagnosis means .A. 知识B. 血管C. 形成D. 视力3. The combining form angio as in the word angiography means .A. 气管B. 肌肉C. 脉管D. 食管4. is an instrument for examining visually the interior of a bodily canal or a hollow organ such as the colon, bladder, or stomach.A. OphthalmoscopeB. StethoscopeC. EndoscopeD. Otoscope5. The of a cold include coughing, sneezing, a running nose, and a feeling of tired and unwell.A. sightsB. signalsC. symptomsD. symbols6. Apart from talking with the patients, doctors should attach equal importance to communication with their patients.A. nonactiveB. nonverbalC. noncommercialD. noncommutable7. diagnosis is to rule out other similar diseases before a diagnosis is confirmed.A. DifferentialB. ProfessionalC. ControversialD. Referential8. Causes of nonspecific neck pain are usually multifactorial, including poor , neck strain, sporting and occupational activities, anxiety and depression.A. posterB. postureC. exposureD. postulation9. An acute condition is one that's flared or is temporary, but it can turn into a long term disorder and is known as .A. conditionalB. transitionalC. transientD. chronic10. Oral include any type of tissue abnormality in the mouth, like dental caries or cavities, ulcers, and gingivitis.A. lesionsB. erosionsC. incisionsD. reversions11. Located immediately below the bladder and just in front of the bowel is the , an organ forming part of the male reproductive system.A. pancreasB. prostateC. stomachD. kidney12. is an inflammatory condition of the lung —affecting primarily the alveoli.A. StomachacheB. PneumoniaC. MeningitisD. Insomnia13. The frequency with which a disease appears in a population is referred to as rate.A. occurrenceB. exchangeC. morbidityD. currency14. Infant rate is the number of infants dying before reaching one year of age, per 1,000 live births in a given year.A. mortalityB. incidenceC. disabilitydD. survival15. Both psychotherapy and drugs are effective for most disorders although the effects kick in on different timetables.A. pathogenicB. psychiatricC. pathologicD. psychoanalytic16. Medicines that cause sun can increase the chance of sun damage.A. activityB. specificityC. sensitivityD. toxicity17. A（n）is a medical procedure that involves taking a small sample of tissue so that it can be examined under a microscope.A. biopsyB. autopsyC. anatomyD. dissection18. Mental disorders in primary care patients are frequently associated with physical that can mask the disorder.A. compensationsB. compromisesC. complicationsD. complaints19. I met Connie the day she was to the hospital ward, where I worked as a volunteer.A. confinedB. admittedC. enrolledD. limited20. Spring is a painful season for those who are highly to flowers and grass pollen.A. allergicB. resistantC. preferentD. ReluctantPractice 1.2 TranslationTranslate the following into English, using the stock phrase given.1. be referred to as 被称为（P003L11P003L11：指学生用书中P=Page, L=Line，后类同）癫有时也被称为发作性疾病，是一个通用术语，指有反复发作的倾向。
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第四章
已知厂商的生产函数为 Q L3 / 8 K 5 / 8 ，假设PL=4元， Pk=5元，求该厂商生产200单位产品时应使用多少L 和K才能使成本降至最低？
第六章
一个完全竞争行业的市场需求函数为Q=1000-50P，该 行业典型企业的生产投入为资本K和劳动L两种要素， 生产函数为 Q KL ，假设单位资本的租金为1， 劳动工资率为4，请给出： （1）该行业中企业的长期生产扩展线方程； （2）该行业中企业的长期成本函数； （3）该行业长期供给曲线； （4）该行业长期均衡的价格与产量； （5）该行业长期均衡时对两种要素的需求量。
ቤተ መጻሕፍቲ ባይዱ
第六章
假设某完全竞争厂商使用劳动和资本从事生产，短期 内资本数量不变而劳动数量可变，其成本曲线为：
LTC 2 / 3Q 16Q 180 Q 3 2 STC 2Q 24Q 120 Q 400
3 2
求： （1）厂商预期的长期最低价格是多少？ （2）如果要素价格不变，短期厂商将继续经营的最低产 品价格是多少？ （3）如果产品价格为120元，短期内厂商将生产多少产 品？
补充练习（二）
第二章 弹性
已知某商品的需求价格弹性系数为0.5，当价 格为每公斤3.2元时，销售量为1000公斤，若 价格下降10%，销售量是多少？该商品降价后 总收益是增加了还是减少了？增加或减少了多 少？
第三章 效用
居民张三的效用函数为 U X , Y x14 y 34 ，其中x为 食品消费量，y为其他商品消费量，且该居民的收入 为5000元，x与y的价格均为10元，请计算： （1）该居民的最优消费组合； （2）若政府提供给该居民2000元的食品兑换券（只能 用于食品消费），则该居民的消费组合有何变化？