单项选择题

家族性寒冷性荨麻疹较多见，为常染色体显性遗传。

A．对
B．错

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单项选择题

Which of the following is true with Jason Smith?

A．He will leave Beijing next Friday.
B．He will leave Beijing next Wednesday.
C．He is going to New York.
D．He will flight directly to Kansas City.

单项选择题

利用电渗析法处理酸洗废水时，反应器内只设置一个阳离子交换膜
A、正确
B、错误