问题 选择题

下图关于细胞核中染色体、DNA、基因三者间包含关系的表述,其中正确的是

答案

答案:C

题目分析:细胞核中容易被碱性染料染成深色的是染色体,它是由DNA和蛋白质组成的,一条染色体上包含一个DNA分子,DNA是主要的遗传物质,DNA分子是由两条长链状盘旋而成的规则的双螺旋结构,基因是染色体上具有控制生物性状的DNA片段。

点评:此题为基础知识题,解答此题的关键是熟记基因是染色体上具有控制生物性状的DNA片段,是生物体遗传物质的基本单位。

阅读理解

This is a talk by a London taxi driver.

"I've been a taxi driver for nearly ten years. Most London taxi drivers have their own taxis."

"It's a nice job most of time. you meet a lot of people. I always work at night, because there is too much traffic during the day. I live twenty miles (英里) outside London and I go to work at 5:30 in the afternoon."

"I usually go home between 2 and 3 in the morning."

"Some very strange things happened late at night .The other day I was taking a woman home from a party .She had her little dog with her. When we got to her house, she found that she had lost her key. So I waited in the car with the dog while she climbed in through the windows."

"I waited and waited. After half an hour of ringing the bell I decided to find out what was going on . I tied the dog to a tree and started to climb in through the window. The next thing I knew was that the police came. They thought I was a thief(小偷).

Luckily the woman came downstairs. She must have gone to sleep and forgotten about me and the dog!"

小题1:.The driver always worked at night because it was easier to _____.

A.drive

B.make money 

C.climb in through the window

D.meet a lot of people小题2:The woman climbed in through the window because _____.

A.she wanted to have a sleep

B.her husband didn't open the door for her

C.she didn't want to pay the driver

D.she couldn't find her key小题3:.The story happened _____.

A.early in the morning

B.late at night

C.20 miles outside London

D.near the police station小题4:Which of the following is wrong?

A.The driver worked until between 2 and 3 in the morning.

B.The police made a mistake.

C.The woman had no money to pay the driver.

D.The woman had forgotten about the driver and the dog.小题5:.The driver climbed in through the window to

A.get money from the woman

B.return the dog to the woman

C.see what was happening in the house

D.phone the police

单项选择题