主治风寒表证胃寒呕吐，风寒咳喘宜选（） A.白芷 B.生姜 C.杏仁 D.藿香 E.

已知i为虚数单位，复数z满足（1-i）z=2，则z=______．

客户交易时输入交易密码后，提示密码有误怎么办？

The teacher suggested the dictionary ___________ at once.

A．be referred to be bought

B．be referred to being bought

C．referred to be bought

D．referred to being bought

黑白相纸按反差性能分为（）

用电信息采集系统采用光纤通信方式（）

A.传输频带宽

B.投资不大

C.传输损耗高