A container weighs more after air is put in, proves that air has weight.A.asB.it
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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
试题答案
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。