题目内容

What did Hal do？

A. Met Mr. Winter.
B. Worked all night.
C. Did his homework.

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Where was Dr. Francis brought up？

A. England
B. Scotland
C. Wales

What does the woman do？

An agent.
B. A tenant.
C. A secretary.

What does the woman suggest the man do？

A. Calm down a little.
Become a doctor.
C. Get medical advice.

真核生物成熟mRNA的两端均带有游离的3'-OH。()

A. 正确
B. 错误