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Wherever there is matter.There is energy;all changes of matter（ ）changes in the form of the energy.
A.retain
B.include
C.involve
D.contain
B.include
C.involve
D.contain
参考答案
参考解析
解析：involve“包含，含有”，必须包括；B.include“包括”。这两个词的主要区分是：involve表示“必然包括，使成为必要”；include是指整体中包括某项内容。A.retain“保持，保留”；D.contain“容纳，装有”。
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