生后肾间充质将产生（）。 A.肾管 B.中肾小管 C.肾小囊 D.输尿管芽_爱下问搜题

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问题单项选择题

生后肾间充质将产生（）。

A.肾管

B.中肾小管

C.肾小囊

D.输尿管芽

答案

参考答案：C

填空题

从下列方框中选择短语并用其适当形式填空。

feel at ease go out work out stay up
make preparations for insist on recover from

1. The mid-term exam is coming soon. The students are busy ______ it.
2. He worked hard, now he ______ and confident about the coming mid-term examination.
3. We should not laugh at those who ______ just______ their failure in maths test.
4. He consistently ______ having sports whether how cold it is.
5. If you want to keep fit, you must ______ for at least one hour every day.

单项选择题

PCM设备E1接口码型为（）。

A.HDB3

B.RZ

C.NRZ

D.AMI