问题
选择题
_A container weighs more after air is put in, ____proves that air has weight.
A．as
B．it
C．that
D．which
答案
答案：D
考查连词。which 引导非限制性定语从句，修饰整个主句的内容，这时不能用that。
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_A container weighs more after air is put in, ____proves that air has weight.
A．as
B．it
C．that
D．which
答案：D
考查连词。which 引导非限制性定语从句，修饰整个主句的内容，这时不能用that。