题目内容

[音频]Listen to a short dialogue between a man and a woman, and then decide whether the following statements are true (T) or false (F).1. Jenny takes five courses this semester.

A. 对
B. 错

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2.She has marketing classes on Wednesday.

A. 对
B. 错

3.She also has computer classes on Tuesday afternoon.

A. 对
B. 错

4.Jenny has a very busy schedule this semester.

A. 对
B. 错

控制基因产物数量的最关键的步骤是（）。

A. mRNA 向细胞质的转运
B. 复制的终止
C. 转录的起始
D. 可变剪接