患者男，18岁。右下肢软组织挫裂伤3小时，急诊科施行清创术后，给予静脉滴注头孢噻吩。

某商店打8折出售商品，就是说现价比原价降低了80%．______．

电解质电离时一定相等的是（　　）

A．阴、阳离子数

B．阳离子和阴离子的质量

C．正电荷总数和负电荷总数

D．每个阳离子和阴离子所带电荷数

根据句子的意思，补全单词。

1. The old woman often stays at home and watches TV, so she has a small           _ of very good friends.

2. My grandfather is a _        _ man in Chinese history, and you can ask him for help when you learn

    Chinese history.

3. Some students in our class are working on the farm, and the _           are studying in the classroom.

4. Cheng Long is a famous Chinese actor.  He _         _ Chinese Kungfu.

5. We had a good harvest in our crops because of _           rain in our hometown last year.

FISP与SSFP所属的序列为 ( )

A．SE序列

B．IR序列

C．GRE序列

D．TSE序列

E．EPI

生产关系是人们在生产过程中结成的（）

A、人与自然的关系

B、人与人的物质利益关系

C、管理与被管理的关系

D、分工协作关系