下列关于氨酰-tRNA合成酶,正确的是( )。A.能活化氨基酸的氨基 B.以GTP

题型:多项选择题

问题:

下列关于氨酰-tRNA合成酶,正确的是( )。

A.能活化氨基酸的氨基

B.以GTP为能量来源

C.氨基酸与tRNA5'端磷酸形成酯键

D.氨基酸和tRNA的结合是特异的

考点:普通考研07理学分子生物学
题型:多项选择题

格式塔心理学家关于环境的理论。

题型:多项选择题

“Everything happens for the best,” my mother said whenever I was disappointed. “Don’t worry. One day your luck will change.”

I didn’t pay attention to her words. After finishing my college education, I decided to look for a job in a radio station. I wanted to host a sports programme. I went to Chicago and knocked on the door of every station. But I got turned down every time.

In one station, a kind lady said to me that I hadn’t got enough experience. “Get to a small station and work for some time,” she said.

When I went back home, my dad told me that a businessman had opened a store and needed someone to help him. But again, I didn’t get the job.

I felt really down. “Your luck will change,” Mum said to me. Later, I tried another radio station in Iowa. But the owner, a nice man, told me he had already had someone to work for him. As I left his office, I asked, “How can someone be a sports announcer (播音员) if he can’t get a job in a radio station?”

I was waiting for the lift when I heard the man call, “What did you mean? Do you know anything about football?” He let me sit in front of a microphone and asked me to try to imagine that I was giving my opinion on a football game, and finally I succeeded.

On my way home, Mum’s words came back to me, “One day your luck will change, Son.”

小题1:What was the writer’s ideal(理想的) job?

A.A sportsman.

B.A shop assistant.

C.A sports announcer.

D.A businessman.小题2:Why didn’t the writer get the job in Chicago? 

A.Because he was too young.

B.Because he didn’t get a college education.

C.Because he was not a good-looking person.

D.Because he hadn’t got enough experience.小题3:The sentence “I got turned down every time” means “   ”.

A.I was refused every time

B.I was successful every time

C.I lost my way every time

D.The door of every station was closed小题4:The writer got a job     in the end.

A.in Chicago

B.in his home town

C.in a college

D.in Iowa

题型:多项选择题

釉质龋中脱矿最严重的区域是()

A.透明层

B.暗层

C.病损体部

D.表层

E.脱矿层

题型:多项选择题

一个口袋中装有大小形状完全相同的2个白球和3个黑球,现从中任取两个球.求:
(1)两个球都是白球的概率;(2)两球恰好颜色不同的概率.

题型:多项选择题

属修治类处方术语的中药是( )。

A.鳞片
B.明天麻
C.田三七
D.陈皮
E.苦杏仁

更多题库