课题四：综合练习
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- 2024-09-05
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以下是小编精心整理的课题四：综合练习，本文共3篇，供大家阅读参考。
教学内容：教科书第45―46页练习十的第5―11题。
教学目的：通过综合练习，使学生进一步加深对亿级数的认识。
教学过程 ：
一、读数、写数练习
1．做练习十的第5题。
读数前，教师说明下面是我国一些主要的工、农业产品的产量，然后让学生读数。读完后，教师还可以选一、两种产品的产量，与前一年的产量比较一下，用以说明我国工、农业生产是逐年增长的，使学生受到爱国主义教育。
2．做练习十的第6题。
先指名学生读题，然后让学生写出横线上面的数，集体订正时，让学生说一说是怎样写的，使学生进一步明确写亿以上的数，要从高位起，一级一级往下写；哪个数位上一个单位也没有，就要在那一位上写0。同时要结合第4小题说明储蓄对国家和个人都 有好处，存款多了说明人民生活富裕了，还要提醒学生注意节约，不要浪费每一分钱。
3．做练习十的第7题。
做题前，先让学生把10600000000写成用“亿”作单位的数，并说一说是如何改写的。然后再把第7题的其他各数写用“万”或“亿”作单位的数。做完后，让学生比较一下把一个数改写成用“万作单位的数和用“亿”作单位的数的方法有什么不同，使学生进一步明确：把一个数改写成用“万”作单位的.数，只要把这个数万位后面的4个0去掉，写上一个“万”字就行了；把一个数改写成用“亿”作单位的数，只要把这个数亿位后面的8个0去掉，写上一个“亿”字就行了。
二、比较数的大小的练习
做练习十的第8题。
做题前，教师板书出两组数：2440000000 244000000
356000000 358000000
让学生比较它们的大小，说出比较两个数的两种情况及方法。然后让学生独立完成第8题，集体订正时，说一说是怎样比较的。
三、综合练习
1．做练习十的第9题。
先给出一个数，如7800500000，让学生说出这个数各是由几个十亿，几个亿、……组成的，数字“7”、“8”、“5”各在什么数位上，表示什么。然后让学生说出9080000000这个数中每个数字在什么数位上，各表示什么。
2．做练习十的第10题。
让学生先写出各数，再把它们写成用“亿”作单位的近似数，订正时，指名说一说各数是如何写成用“亿”作单位的近似数的。
3．做练习十的第11题。
做题前，先让学生写出比1万大1和比1万小1的数，并用万作单位写出它们的近似数。然后让学生完成第11题：写出比1亿大1和比1亿小1的数，并用亿作单位写出它们的近似数，使学生体会到比1亿大1和比1亿小1的数是近似数都是1亿。
高三生物微生物专题综合练习四
1. 下图所示为在理想状态下和自然环境中某生物的
种群数量变化曲线。下列对阴影部分的解释正确的`是（ ）
①环境中影响种群增长的阻力
②环境中允许种群增长的最大值
③其数量表示种群内迁出的个体数
④其数量表示通过生存斗争被淘汰的个体数
A. ①③ B. ②③
C. ①④ D. ②④
2．某一种细菌菌株需要从环境中摄取现成的亮氨酸（20种氨基酸中的一种）才能够生长，
此菌株对链霉素敏感。实验者用诱变剂处理此菌株，想筛选出表中列出的细菌菌株类
型。根据实验目的，选用的培养基类型是 （ ）
注：L―亮氨酸 S―链霉素 “+”―加入 “－”―不加入
例如：L―：不加入亮氨酸；S+：加入链霉素
选
项
筛选出不需要亮氨酸的菌株应使用的培养基
筛选出抗链霉素的菌株应使用的培养基
筛选出不需要亮氨酸、抗链霉素的菌株应使用的培养基
A
L+，S+
L―，S―
L+，S―
B
L―，S―
L+，S+
L―，S+
C
L―，S+
L+，S+
L―，S―
D
L+，S―
L―，S―
综合练习四
Direction: Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the best answer that completes the sentence.
1. Mr. White works as a lawyer now, but he in a company for several years.
A．worked B．has worked C．had worked D．has been working
2. Silver is the best conductor of electricity, copper it closely.
A．followed B．to follow C．following D．being followed
3. I’ll be away for a few days. If anything happens, telephone me email me to save money.
A．and B．or C．but D．then
4. To pay to see that movie will be foolish you can see it on TV for nothing.
A．where B．when C．however D．that
5. As teachers we should concern with what is said, not what we think .
A．have to be said B．must say C．ought to be said D．need to say
6. Although Tom agreed with her on most points, here was one he was unwilling to give in.
A．on which B．in which C．to which D．with which
7. It _______ to her that she might as well talk it over with Xiao Liu.
A. happened B. occurred C. became D. came
8. She is in a poor _______ of health, which worries her mother much.
A．position B．situation C．state D．condition
9. ________ your composition carefully, some spelling mistakes can be avoided.
A．Having checked B．Check C．If you check D．To check
10. _______ send me a check? I haven’t received it yet.
A. Could you B. Would you C. Are you going to D. Were you going to
11. You ______ out enjoying yourself when you ought to have been studying.
A. will be B. would be C. are D. were
12. After hospitals buy expensive equipment, they must try to _________ the money they have spent.
A. recover B. reduce C. remove D. receive
13. It _________ Jack that parked the car like that as he’s the only one who can drive.
A. might be B. could be C. must have been D. ought to be
14. Please ________ when you go out at night in this city. It can be very dangerous.
A. look out B. take care C. hurry up D. wake up
15. －How would you like your beef? －________.
A. Well-done B. It’s OK. Thank you C. The stronger, the better D. That’s enough
16. The residents（居民）, _______ had been damaged by the fire, were given help by the Red Cross.
A. all of their homes B. all their homes C. whose all homes D. all of whose homes
17. The young man we followed stopped and looked as if ________ whether he was going in the right direction.
A. seeing B. to have seen C. having seen D. to see
18. Eating too much fat can ________ to heart disease and high blood pressure.
A. devote B. attend C. contribute D. turn
19. ________ in the office had made a mistake, and the firm regretted causing the customer inconvenience.
A. Someone B. Anyone C. Everyone D. No one
20．He is ready to help others ,seldom, refusing them when they turn to him.
A．if never B．if ever C．if not D．if any
21. After he gave a report about the school, Mr White____ the visitors around it.
A. went on to show B. went on showing C. went on with showing D. kept on showing
22. - Tom works hard at English.?
-_____, and _____.
A. So does he; so you do B. So you do; so is he
C. So he will; so do you D. So he does; so do you
23. When you write to him, please _____ him.
A. give my loves to B. give my regard to C. remember me to D. give my wishes for
24. We have done things we ought not to have done and___ undone things we ought to have done.
A. left B. leave C. will leave D. leaving
25. People are puzzled _____ they read the book.
A. the first time B. at the first time C. for the first time D. at first
26. In some countries,_____ are called “public schools” are not owned by the state.
A. that B. which C. as D. what
27. - The boy is tall enough _____ his age.
-Yes, I was much _____ when I was his age.
A. to; shorter B. at; taller C. at; shorter D. for; shorter
28. -Who are you waiting for?
- _____ the man wounded in the left leg.
A. The doctor will operate on B. Tie nurse to be looked after
C. The doctor to operate on D. His brother got
29. -How did you _____ the movie last night?
-Oh, both interesting and instructive.
A. find B. consider C. think D. feel
30. With his son _____, the old man felt unhappy.
A. to disappoint B. to be disappointed C. disappointing D. being disappointed
31. The food tastes _____ and sells _____.
A. well; well B. good; good C. good; well D. well; good
32. The sun was shining brightly, _____ everything there _____ more beautiful.
A. making; look B. to make; looked C. and made; looking D. and making; be looked
33. It' s too late to go out for a drive around now. _____, it's starting to pour down.
A. Besides B. Meanwhile C. However D. Anyhow
34. Everybody in the little town knew my first teacher, so we had no _____ finding his home.
A. difficulties in B. difficulty with C. difficulty D. difficulty to
35. I can't understand it, will you please _____ once more?
A. explain that word B. repeat that word
C. explain us that word D. explain that word for us
36. --Do take it. I don't need two.
--
A. Really, I can't, but thank you just the same B. Yes, you can give it to others
C. I can't, because I don't like it D. Thank you. I'll take both
37. -- was it you discovered the secret of his?
--Totally by chance.
A. How; that B. How; when C. What; that D. What; when
38.-Do remember to take this medicine three times a day with warm boiled water.
-__________
A. Heard it . B. Got it . C. Made it . D. Taken it .
39.-Why do the Japanese prefer to use foreign words ?
-By using _________ foreign word you can make ___________ subject seem new.
A. a ; a B./；/ C. the ; a D. the ; the
40._________ is Britain now used to be three different countries and over many years the three countries became one .
A. It B. What C. Where D. As
41.Yassin’s death was not _________ to stop Hamas’ ability to ________ terror attack.
A．hoped; go on B．decided; hold out
C．intended; break out D．expected; carry out
42.I was advised to arrange for insurance(保险) __________ I needed medical treatment.
A．nevertheless B．although C．in case D．so that
43.-I’m sorry I broke your teapot.
-_________
A．Forget it. B．Bad luck C．Oh, is that so? D．Really?
44.Our school is no longer _________ it was 10 years ago, _________ it was not well equipped.
A．what; which B．that; which C．what; when D．that; where
45.Then ________ we had been looking forward to.
A．came the hour B．the hour came
C．comes the hour D．the hour is coming
46. Mary cares about clothes too much, and she _____ too much money _____ clothes.
A. spend; in B.cost; at C. pays; to D. spends; on
47. Our kind teacher wanted to teach us _____ he knew about this lesson.
A. that B. all what C. that all D. everything which
48. They started early that morning in order that they_____ there before noon.
A. would get B. got C. must get D. might get
49. Is this research center _____ the foreign guests visited last week?
A. that B. which C. where D. the one
50.--What is the model plane look like?
--Well, the wings of the plane are _____ of its body.
A. more than the length twice B. twice more than the length
C. more than twice the length D. more twice than the length
责任编辑：李芳芳
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