穿行于前列腺的结构是：（）.A、输尿管 B、精囊 C、输精管 D、射精管 E、 * * 海

用所给动词的适当形式填空。

1. My brother's ______ (write) habits are not good.

2. My mom goes shopping ______ (two) a week.

3. She tries ______ (eat) a lot of vegetables and fruit.

4. On weekends, I have to help my mom ______ (clean) the house.

5. ______ (not) run after meals.

库血保存时间不超过（）.

A.3天

B.1周

C.3周

D.4周

E.5周

晶鞘纤维

A．青蒿
B．番泻叶
C．麻黄
D．广藿香
E．薄荷

首次将法律铸在鼎上的人是（）

A、夏桀

B、商纣

C、子产

D、商鞅