Water is the 46 of all the things we eat and drink . Not many people understand this but 47 ——青夏教育精英家教网—

Water is the __46___　 of all the things we eat and drink . Not many people understand this but __47____ quite true . The human body can go without ___48___ for a long time . We’ve got many examples for this . Yet two __49___ three days　 without water can usually make people __50____ . Man can’t live __51____ water .

Many people don’t understand how ___52__　 water the human body needs __53___ work well , and many people , especially young people , do not drink enough , ___54__ in very hot weather . Our body has mostly water , about 65% to 75% . That is to say about two thirds of our body is water . When we do sports , some of the water will get away from our body . __55 _ we don’t drink some water , we won’t have enough water．　And if we don’t have enough water , we’ll feel tired and many of us will get ill . So you know how important water is to us .

(　 )46. A. important	B. most important	C. more important	D. different
(　 )47.A. it’s	B. its	C. it	D. is
(　 )48.A. food	B. water	C. drink	D. meat
(　 )49.A . so	B. And	C. But	D. or
(　 )50. A. to die	B. die	C. to died	D. died
(　 )51. A. have	B. with	C. without	D. in
(　 )52.A. many	B. much	C. little	D. few
(　 )53.A. and	B. the	C.　 /	D. to
(　 )54.A. even	B. ever	C. almost	D. hardly
(　 )55.A. If	B. For	C. Since	D. Because

试题详情

(　 )26. A war took place in ____ .
	A. the 1720’s	B. 1720s	C. 1720’s	D. the 1720
(　 )27. ----Could you take ____ for these ____?　 They are very beautiful .
	A. any ph otos, tomatoes	B. some photos, tomatoes
	C. some photos, tomatos	D. any photos, tomatoes
(　 )28. Don’t you think ___ important to protect our earth?
	A. that	B. how	C. it	D. this
(　 )29. Last night he had a bed to sleep ___, but I had only a chair to sit ____.
	A. in, on	B. x, x	C. on, in	D. in, to
(　 )30. The door is not ___ for the elephant to pass.
	A. wide enough	B. widely enough	C. enough wide	D. enough widely
(　 )31. How far is it from your home to your school ?　 It is a quarter’s walk ____.
	A. here and there	B. now and then	C. up and down	D. more or less
(　 )32. What was the date yesterday ?　 _____.
	A. It was Saturday	B. It was November 21^st
	C. It was cloudy	D. It was 2pm
(　 )33. – Hello, May I speak to Mike? 　　　 -- _____. Please call back later?
	A. Wait a moment	B. Hold on	C. Speaking	D. Sorry , he is out
(　 )34. ----I’m afraid I’ve got a bad cold . 　　　 ---- _____.
	A. Never mind	B. keep away from me
	C. Better go and see a doctor	D. You need to eat less food
(　 )35. Everyone except Tom and John ____ seen the film.
	A. is	B. has	C. are	D. have
(　 )36. Mike, you ____ on the phone .
	A. is wanted	B. want	C. are wanting	D. are wanted
(　 )37. She was supposed _____ in hospital , but people found her in the office .
	A. to lie	B. lying	C. lie	D. lies
(　 )38. When and where to build the new school ____ ?
	A. is not decided	B. are not decided	C. has not decided	D. have not decided
(　 )39. Are you going to borrow a dictionary or a magazine ? -- ____.
	A. Yes, a dictionary	B. No, a magazine	C. A dictionary	D. Yes, both
(　 )40. A lovely girl, ______?
	A isn’t she	B isn’t it	C is she	D it
(　 )41. His father likes going hiking.　 ________.
	A. So does his mother	B. So is his mother
	C. So his mother is	D. So his mother does
(　 )42. Our teacher told us the sun ____ in the east .
	A. rise	B. rose	C. rising	D. rises
(　 )43. Let’s ___ play in the street .　 Father tells me ____ do so.
	A. not to ….. not to	B. not …not to	C. don’t , to not	D. not to …don’t
(　 )44. I’ll go for a walk with you if it ____ tomorrow.
	A. won’t rain	B. doesn’t rain	C. will rain	D. not rains
(　 )45. The old man is ill and he doesn’t feel like _____.
	A. to eat something	B. to eat anything	C. eating something	D. eating anything

试题详情

A.听句子(本大题有5小题，每小题1分，共5分)

根据句子的内容和所提的问题，选择符合题意的图画回答问题。(每小题听一遍)

(　 )1. Where does he live?
	A	B	C
(　 )2.Where is the speaker?
	A	B	C
(　 )3.What’s Marry doing?
	A	B	C
(　 )4.Which is the speaker’s family photo?
	A	B	C
(　 )5.Who is Mr. Black?
	A	B	C

B.听对话(本大题有10小题，每小题1分，共10分)

　　回答每段对话后面的问题，在各题所给的三个选项中选出一个最佳答案。(每段对话听两遍)

听第1段对话，回答第6题。

(　 )　 6. How many chairs do the stude nts need in all? C. Forty-two.
	A. Forty-eight	B. Forty-nine.

请听第二段对话，回答第7小题

(　 )7. The boy was ______ yesterday afternoon.
	A. at home	B. at the school	C. on his birthday

请听第三段对话，回答第8小题

(　 )8. Where is Jim now?
	A. London.	B. Beijing.	C. Shanghai.

请听第四段对话，回答第9小题

(　 )9. What does the woman mean?
	A. She’ll go with the man.	B. She can’t leave now.
	C. She doesn’t want to go with him.

请听第五段对话，回答第10小题

(　 )10. What can we know from the dialogue?
	A. Tom lived here one year ago. B. Lucy doesn’t live here. C. Tom wanted to take a message for Lucy.

请听第六段对话，回答第11-12小题

(　 )11. What is Tom doing?
	A. He is writing a letter.	B. He is reading a letter.
	C. He is doing homework.
(　 )12. Where does Tom want to go for his university study?
	A. Beijing	B. Shanghai	C. New York

请听第七段对话，回答第13-15小题

(　 )13. How does the woman feel after the long trip?
	A. Very tired.	B. OK.	C. Quite sleepy.
(　 )14. How long will it take them to get home?
	A. A few minutes.	B. About an hour.	C. About two hours.
(　 )15. Where does the dialogue happen?
	A. At the strain station	B. At the airport
	C. At the bus stop

C.听短文　 (本大题有5小题，每小题1分，共5分)

　根据短文内容，在各题所给的三个选项中，选出一个最佳选项。(短文听两遍)

(　 )　 16. The man bought a ring for his _________ .
	A. son	B. wife	C. mother
(　 )17. He lost his ring ___________.
	A. in the street	B. in the store	C. in the house
(　 )18. __________ the man was looking for the ring, his friend came up.
	A. Before	B. After	C. When
(　 )19. Why did the man begin to look for the ring in the street? Because _________.
	A. he lost it in the street	B. it was much brighter in the street
	C. he wanted someone to help him
(　 )20. The man was __________.
	A. clever	B. interesting	C. foolish

D.听填信息(本大题有5小题，每小题1分，共5分)

　根据所听到的内容，填写正确的信息(短文听两遍此题答案不能填涂在答题卡上。)

What to want?	21　　 wanted.
School:	Chicago 　　22
Time:	In　　23
Type of housing:	A　　　24　　　 room.
Price ( per month ) :	About 　　25　　　dollars

试题详情

(二)基因自由组合定律的实质

1、位于非同源染色体上的非等位基因的分离和组合是互不干扰的。

2、在减数分裂过程中，同源染色体上的等位基因彼此分离的同时，非同源染色体上的非等位基因自由组合。

[基础训练]

1、下列关于基因和染色体关系的叙述，错误的是(　 C　 )

A、染色体是基因的主要载体　　　　　　　　　　　　　

B、基因在染色体上呈线性排列

C、一条染色体上有一个基因　　　　　　　　　　　　　

D、体细胞(细胞核)中基因成对存在，染色体也成对存在

2、一对表现型正常的夫妇，生了一个既患白化病(a)又患色盲(b)的男孩。此男孩外祖父和外祖母的基因型不可能是(　 C　 )

A、AaX^BY、AaX^BX^b　　 B、AaX^BY、aaX^bX^b　　　 C、AAX^bY、AAX^BX^b　　 D、AaX^BY、aaX^BX^b

3、已知果蝇中，灰身与黑身为一对相对性状(显性基因用B表示，隐性基因用b表示)；直毛与分叉毛为一对相对性状(显性基因用F表示，隐性基因用f表示)。两只亲代果蝇杂交得到以下类型和比例：

请回答：

	灰身、直毛	灰身、分叉毛	黑身、直毛	黑身、分叉毛
雌蝇	3/4	0	1/4	0
雄蝇	3/8	3/8	1/8	1/8

(1)控制灰身与黑身的基因位于常染色体；控制直毛与分叉毛的基因位于X染色体。

(2)亲代果蝇的表现型为♀灰身直毛、♂灰身直毛。

(3)亲代果蝇的基因型为BbX^FX^f、BbX^FY。

(4)子代表现型为灰身直毛的雌蝇中纯合子与杂合子的比例为1︰5。

(5)子代雄蝇中，灰身分叉毛的基因型为BBX^fY、BbX^fY；黑身直毛的基因型为bbX^FY。

[高考模拟]

4、(2007广东高考)(多选)果蝇中，正常翅(A)对短翅(a)为显性，此对等位基因位于常染色体上；红眼(B)对白眼(b)为显性，此对等位基因位于X染色体上。现有一只纯合红眼短翅的雌果蝇和一只纯合白眼正常翅雄果蝇杂交，你认为杂交结果正确的是(　 AC　 )

A、F₁中无论雌雄都是红眼正常翅　　　　　　　　　　

B、F₂雄果蝇的红眼基因来自F₁的父方

C、F₂雄果蝇中纯合子与杂合子的比例相等　　　

D、F₂雌果蝇中正常翅个体与短翅个体的数目相等

5、(2007全国卷Ⅰ)回答下列Ⅰ、Ⅱ小题：

Ⅰ、雄果蝇的X染色体来自亲本中的雌蝇，并将其传给下一代中的雌蝇。雄果蝇的白眼基因位于X染色体上，Y染色体上没有该基因的等位基因，所以白眼这个性状表现为伴性遗传。

Ⅱ、已知果蝇刚毛和截毛这对相对性状由X和Y染色体上一对等位基因控制，刚毛基因(B)对截毛基因(b)为显性，现有基因型分别为X^BX^B、X^BY^B、X^bX^b和X^bY^b的四种果蝇。

(1)根据需要从上述四种果蝇中选择亲本，通过两代杂交，使最终获得的后代果蝇中，雄性全部表现为截毛，雌性全部表现为刚毛，则第一代杂交亲本中，雄性的基因型是X^bY^b，雌性的基因型是X^BX^B；第二代杂交亲本中，雄性的基因型是X^BY^b，雌性的基因型是X^bX^b，最终获得的后代中，截毛雄蝇的基因型是X^bY^b，刚毛雌蝇的基因型是X^BX^b。

(2)根据需要从上述四种果蝇中选择亲本，通过两代杂交，使最终获得的后代果蝇中，雌性全部表现为截毛，雄性全部表现为刚毛，应如何进行实验？(用杂交实验的遗传图解表示即可)

试题详情

(一)基因分离定律的实质

1、杂合子的细胞中，位于一对同源染色体上的等位基因具有一定的独立性。

2、在减数分裂形成配子时，等位基因随同源染色体的分开而分离，分别进入两个配子中，独立地随配子遗传给后代。

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(四)基因的相对位置：基因在染色体上呈线性排列。

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(三)实验结论：基因在染色体上。

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