你能根据课本P13 的第二篇电子邮件回答下列问题吗?

1 、Who wrote this e-mail? 

 ____________________________

2 、How many e-mails has Li Ming written today?

___________________________

3 、What is the best way to learn English?

_______________________

4 、What's Li Ming's favourite subject?

__________________________

5 、Who is very good at math?

________________________

异烟肼

A．对氨基苯甲酸
B．间氨基酚
C．游离肼
D．游离生育酚
E．游离水杨酸

以下药物应检查的特殊杂质是