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在algo周围
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举一反三
【单选题】Everyone should ______ the danger of smoking.
A.
aware that
B.
be aware of
C.
aware of
D.
be aware that
【单选题】Although he _______ the danger to his own health, he found it difficult to quit smoking.
A.
was very aware of
B.
well awared of
C.
was well aware of
D.
very awared of
【简答题】共发射极放大器中集电极电阻 R C 起的作用是