题目内容


Can you imagine that rats eat 40 to 50 times _______.
A．by weightB．their weightC．in weightD．of their weight
B
考查倍数表达法：倍数+名词（their weight），句意：你能想象老鼠吃的是体重的40-50倍吗？选B。A是按重量算，C是重量上，D是他们的重量。
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