问题 单项选择题

检测蛋白质表达水平的技术是()

A.Southern印迹

B.Northern印迹

C.聚合配链反应

D.Western印迹

E.RT-PCR反应

答案

参考答案:D

阅读理解

I went home one Saturday afternoon in the autumn of 1993 to get some work done in the garden. While sweeping leaves on the ground, my five-year-old son Nick came over and asked me to write something on a piece of paper to make a sign for him.

"What for?" I asked.

" I’m going to sell some of my stones, " he answered.

Nick was fascinated with stones and had collected many stones from all over.

" I’m too busy to do that for you. Go and ask your mum for help," I said.

A short time later, Nick, returned with a sign, reading, " Stones, One Dollar Each". He took the sign, a small chair and 4 of his best stones and walked to the road in front of our garden. There he put the stones in a line and sat down on the chair.

After half an hour, nobody passed by. I walked to him and asked him to go back, but he didn’t.

Another half hour later, a small car came down the road. I watched as Nick stood up, holding his sign up. A woman rolled down a window and read the sign. I couldn’t hear their talk, but I saw the woman turn to the driver and the man reach for his pocket.

I sat in the yard, as Nick ran to me. Waving the dollar, he shouted, "I told you I could sell one stone for a dollar -- if you believe in yourself, you can do anything. "

小题1:Why didn’t the writer help his son?

A.Because his wife is better at making a sign.

B.Because he didn’t know what to write.

C.Because he was busy sweeping leaves.

D.Because he didn’t want his son to sell the stones.小题2:The underlined words "was fascinated with" mean _________.

A.was far from

B.was afraid of

C.was famous for

D.was interested in小题3:Nick was a boy ___________.

A.who was kind

B.who had a strong mind

C.who was honest

D.who had many hobbies小题4:Which is the best title(题目) of the story?

A.My son’s first sale.

B.Let’s collect stones.

C.How to sell a stone.

D.A hobby that can make you rich.小题5:From the passage we know______________.

A.the story happened in spring

B.the car was driven by a woman

C.Nick spent half an hour selling one stone

D.the writer might be moved(感动)by his son

选择题