问题 单项选择题

1953年,沃森和克里克发现了DNA双螺旋的结构,开启了分子生物学时代。分子生物学使生物大分子的研究进入一个新的阶段,使遗传 的研究深入到分子层次,“生命之谜”被打开,人们清楚地了解遗传信息的构成和传递的途径。在以后的近50年里,一个又一个生命的奥秘从分子角度得到了更清 晰的阐明。发现DNA双螺旋的结构有重要意义,但以下哪项不在此列?

A.开启了分子生物学时代

B.分子生物学打开了“生命之谜”

C.开创了生物大分子的研究

D.分子生物学从分子角度阐明了生命的许多奥秘

答案

参考答案:C

解析:文段中说的是“使生物大分子的研究进入一个新的阶段”,而非“开创了生物大分子的研究”,故本题答案为C。

阅读理解

Passage 4

Mr Brown was going away for a week. Before he left, he said to his son, "if anyone asks for me, you can tell him that your father has been out for doing something, and will be back in a week, then be sure to ask him to sit down for a cup of tea."

"OK, Dad," said his son. But he was afraid his son couldn't remember this, he wrote these words down on a piece of paper and gave it to him. His son put it into his small pocket, took it out and looked at it every now and then.

Four days passed, but no one came to see his father. The boy thought that there was no man to come and that the piece of paper was of no more use for him, so he burnt it that evening.

The next afternoon, someone knocked at the door. The boy opened it. A man was standing at the door and said, “Where is your father?” The boy put his hand into his pocket at once and looked for the piece of paper. He could not find it. He suddenly remembered he had burnt it, so he shouted, “No more.”

The man was very surprised. He asked, “No more? I met your father last week. When did it happen?”

"Burnt yesterday evening."

小题1: Mr Brown told his son that _____.

A.he would be away from home for four days

B.he would be back in seven days

C.he would be back in a month

D.he liked a cup of tea小题2:Mr Brown wrote the words down on ________.

A.the wall

B.the door

C.a piece of paper

D.his son's pocket小题3: A man came to visit the boy's father on ________.

A.the second day

B.the third day

C.the fourth day

D.the fifth day小题4: The man was very surprised because _________.

A.he thought the child's father was dead

B.the child didn't ask him to sit down

C.the child gave him a cup of tea

D.he couldn't find that piece of paper小题5:What was burnt? ___________.

A.The piece of paper

B.Mr Smith

C.The visitor

D.The boy

单项选择题