食品在冰箱中能保存一夜时间不腐烂，是因为冰箱中 [ ]
A．细菌无法进入
B．冰箱能杀菌
C．细菌在冰箱中繁殖速度慢
D．有防腐剂
答案：C
That party has been in ________ for many years and it has showed its ________ in dealing with
many important problems. [ ]
A. power; energy
B. power; strengths
C. force; energy
D. force; strengths
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