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单选题
_____ to flow spontaneously from a block of ice to a surrounding volume of water, this could occur in complete accord with energy conservation.
A
There were energy
B
There was energy
C
Were energy
D
If energy is
参考答案
参考解析
解析：
句意：如果能量自然的从冰传递到周围的水中，这就与能量守恒定律完全吻合。由于句子后半部分采用过去式，故D项错误。前半句明显是一个条件状语从句，排除A、B两项，C项是倒装形式，原型是if energy were，故C项正确。
句意：如果能量自然的从冰传递到周围的水中，这就与能量守恒定律完全吻合。由于句子后半部分采用过去式，故D项错误。前半句明显是一个条件状语从句，排除A、B两项，C项是倒装形式，原型是if energy were，故C项正确。
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