正常成人的血液总量约相当于体重的（） A.4％～5% B.5%～6% C.6%～7%

He’ll remember as many English words as he can ______ the exam.

A．pass

B．not lose

C．passes

D．to pass

根据所给汉语提示写出单词。

1. My brother goes to the park _____ (两次)a month.

2. The park is _____ (四十)miles away from here.

3. Add some _____ (食盐)to the dish, please.

4.Chinese food is very popular in some _____ (西方的)countries.

5.I don't like to _____ (借)some money from my friends.

简述大小鼠断头取血法。

合理安排、使用和调配人员的基本依据是（）

A.人事选拔

B.人事监督

C.人员培训

D.人员考评

我国铁路公用数据通信网采用的是（）标准。

A.X.28

B.X.75

C.X.25