语法与词汇
16.
We want such materials______can bear high temperature and pressure.
A、
that
B、
as
C、
what
D、
which
【正确答案】
B
【答案解析】
such materials as引导的是定语从句,as在从句中作主语,而such materials that引导的是结果状语从句,that在从句中不充当成分。
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