Small computers need small amount of power, _______ means you use less electricity.?
A．whatB．that?
C．whichD．a(chǎn)s?
C?
as和which都可以引導(dǎo)非限制性定語從句，指代前面整句話的內(nèi)容。本題只需要在C、D兩項中選擇。as引導(dǎo)非限制性定語從句，并在從句中作主語時，其后面的謂語動詞一般是連系動詞。如果從句謂語動詞是行為動詞，則必須用which。
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