整合在宿主菌染色体上的是（）。A.染色体 B.质粒 C.毒力岛 D.

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问题单项选择题

整合在宿主菌染色体上的是（）。

A.染色体

B.质粒

C.毒力岛

D.转座子

E.前噬菌体

答案

参考答案：E

补全对话，情景问答

( ) 1. A: What time is it? 　　　 B: It's three o'clock. It's time for music class.	A.
( ) 2. A: What time is it? 　　　 B: It's seven o'clock. It's time for breakfast.	B.
( ) 3. A: What time is it? 　　　 B: It's nine o'clock. It's time for dinner.	C.
( ) 4. A: What time is it? 　　　 B: It's ten o'clock. It's time for P. E. class.	D.

问答题简答题

在现今形势下，大学生应该具备怎样的择业观念？