1.选择题- (共15题)
6.将正常生长的玉米根尖细胞放在含3H标记的胸腺嘧啶脱氧核苷酸的培养液中，待其完成一个细胞周期后，再转入不含3H标记的胸腺嘧啶脱氧核苷酸的培养液中培养，让其再完成一个细胞周期。此时获得的子细胞内DNA分子不可能为（只考虑其中一对同源染色体上的DNA分子）（ ）
7.将正常生长的玉米根尖细胞放在含3H标记的胸腺嘧啶脱氧核苷酸的培养液中，待其完成一个细胞周期后，再转入不含3H标记的胸腺嘧啶脱氧核苷酸的培养液中培养，让其再完成一个细胞周期。此时获得的子细胞内DNA分子不可能为（只考虑其中一对同源染色体上的DNA分子）（ ）
9.研究发现，小麦颖果皮色的遗传中，红皮与白皮这对相对性状的遗传涉及Y、y和R、r两对等位基因。两种纯合类型的小麦杂交，F1全为红皮，用F1与纯合白皮品种做了两个实验，如下：
实验1：F1×纯合白皮，F2的表现型及数量比为红皮∶白皮＝3∶1；
实验2：F1自交，F2的表现型及数量比为红皮∶白皮＝15∶1。
分析上述实验，回答下列问题：
12.下图表示细胞分裂和受精作用过程中核DNA含量和染色体数目的的变化，据图分析可得出（ ）
①a阶段为有丝分裂、b阶段为减数分裂
②M点所示过程与细胞膜的流动性有关
③GH段和OP段，细胞中含有的染色体数是相等的
④MN段发生了核DNA含量的加倍
13.—Would you please not speak so loudly in _______ public?
— Sorry. I will remember to speak in _______ lower voice.
15.小鼠毛皮中黑色素的形成是一个连锁反应，当R、C基因(两对等位基因位于两对同源染色体上)同时存在时，才能产生黑色素，如图所示。现有基因型为CCRR和ccrr的两小鼠进行交配得到F1，F1雌雄个体交配，则F2的表现型及比例为（ ）
2.单项选择- (共15题)
16.
Each time we have dinner together , __________ , as a matter of fact , is indeed uncommon , turns out a fierce quarrel .
| A．that | B．which |
| C．when | D．where |
17.
After his company’s closing down , he lost both his wealth and confidence , and never found __________ of them again .
| A．both | B．neither |
| C．either | D．all |
18.
In fact , the hazy weather problem is so severe now that it has aroused __________ nationwide concern about __________ environmental pollution .
| A．/ ; / | B．/ ; the |
| C．a ; / | D．a ; the |
19.
– I spent three hours buying a train ticket at the railway station the other day .
-- Why ? You __________ one on the Internet or by phone .
-- Why ? You __________ one on the Internet or by phone .
| A．could have bought | B．must have bought |
| C．would buy | D．should buy |
20.
As is known to all , bicycles of this kind __________ well here .
| A．is sold | B．are sold |
| C．sells | D．sell |
21.
His new movie moved all audience to tears, _____to mind another moving one about war and love
| A．to call | B．calling |
| C．called | D．being called |
22.
We are really disappointed to see millions on earth who have nothing but hunger and cold __________ no chance to improve their life .
| A．to have | B．having |
| C．having had | D．have |
23.
It was from only a few supplies that she had bought in the village __________ the hostess cooked such a nice dinner .
| A．that | B．where |
| C．which | D．when |
24.
The newly married couple couldn’t afford to buy a new car ; __________ , they bought a used one .
| A．however | B．instead |
| C．otherwise | D．still |
25.
I will never forget the park __________ I spent so many happy hours there with my parents last summer .
| A．where | B．because |
| C．which | D．so |
26.
---where’s Mom?
-----She’s in the kitchen. She _____the housework all morning
-----She’s in the kitchen. She _____the housework all morning
| A．is doing | B．was doing |
| C．did | D．has been doing |
27.
We are roommates for 3 years and never once __________ .
| A．we have quarreled | B．have we quarreled |
| C．do we quarrel | D．did we quarrel |
28.
__________ is no possibility __________ Bob can win the first prize in the match .
| A．There ; whether | B．There ; that |
| C．It ; whether | D．It ; that |
29.
– Well , Jack , I am sorry that I have to leave .
-- __________ . Let’s email often .
-- __________ . Let’s email often .
| A．Enjoy yourself | B．That’s for sure |
| C．So am I | D．Keep in touch |
试卷分析
-
【1】题量占比
选择题:(15道)
单项选择:(15道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：3
5星难题：0
6星难题：9
7星难题：0
8星难题：3
9星难题：0