肾性贫血的EPO治疗初始剂量，哪项不对（）。A.皮下给药：100～120IU/Kg/

阅读短文，判断下列句子是否符合短文内容，正确的写“T”，错误的写“F”。

      Hi! I'm David. I'm from Canada. Today is Tuesday. We have math, Chinese and computer. I like

computer class. Because my computer teacher is very kind and active. He looks tall and strong. We all like him.

On Wednesday, we have eggplant and fish for lunch. I don't like eggplant. Potatoes are my favourite food. My

favourite day is Saturday. I often play football on Saturdays. I do my homework, too. Can you tell me about

your school life?

( ) 1. David is from Canada.

( ) 2. It's Wednesday today.

( ) 3. His computer teacher looks tall and strong.

( ) 4. They have eggplant and potatoes for lunch on Wednesday.

( ) 5. David likes Saturday because he can play football.

某单位有27名老年人，54名中年人，81名青年人．为了调查他们的身体情况，用分层抽样的方法从他们中抽取了n个人进行体检，其中有3名老年人，那么n=______．

涉及零件临时代替采用时，由工长接收技术组以邮件或书面形式下发零件（）。

A.《代替采用信息通知单》

B.《试装通知单》

C.《装配记录单》

D.《替代件记录单》

以下哪一项属于人的生活的范畴：（）

A、更好的谋生

B、觅食性

C、机体的生存

D、以上都是

机要通信人员工作证的管理规定是什么？