受体菌直接摄取了供体菌游离DNA片段,这一过程称为转导.()
参考答案:错
解析:转化
---Excuse me, I want to buy some stamps. Where can I find a post office?
---I know _____ not far from here. You can easily find _____.
A.that; it
B.it; one
C.one; it
D.it; that
一般来说,某个大学生毕业后未能立即找到工作,属于( )。
A.结构性失业
B.自愿性失业
C.摩擦性失业
D.周期性失业