根据答句写问句。

1.                                                        ？

     I went swimming on my holiday.

2.                                                        ？  

     I read a book yesterday.    

3.                                                        ？

     Sarah went to Beijing by train.  

4.                                                        ？

      I am 160 cm tall.    

5.                                                        ？

      Yes, I went to the library yesterday.

影响注射剂湿热灭菌的因素有

A．药物性质

B．细菌的种类和数量

C．灭菌的时间

D．介质的性质

E．蒸汽的性质