氯化钠注射液pH值为
A．3.5～8.0
B．3.0～10.0
C．5.0～7.0
D．4.0～9.0
E．6.0～9.5
参考答案：C
147. --- Where does Jack work?
--- I’m not sure, but he worked at Motorola when I last met him, _____.
A．however
B．though
C．yet
D．Anyhow
简述历史教师编写教案的基本要求。
