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【简答题】
绿色化学的5R原则包括减量、回收、再生、 和拒用
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举一反三
【单选题】John spent most of his time practising speaking English in addition _____ his spare time. [ ]
A.
of
B.
to
C.
for
D.
into
【单选题】His humorous closing speech was a welcome addition to the _____ dull meeting. [ ]
A.
therefore
B.
meanwhile
C.
otherwise
D.
nevertheless
【单选题】In addition to his theory of color, Newton developed a theory of how light travels, This is known as the corpuscular theory of light, meaning that light travels as a series of tiny bits rather than in...
A.
Newton was not a successful scientist until he published his works
B.
Newton was a scientist with at least three theories
C.
Newton's theory was not accepted because Hooke did not approve it
D.
Newton did not publish his theories because he was too disappointed
【单选题】In addition to his traditional medical treatment, he tried to put himself in situations______ would bring about positive emotions.
A.
which
B.
where
C.
why
D.
as
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