题目内容

A´B =B´A （当A¹B时）

A. 对
B. 错

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= Û x=uÙy=v

A. 对
B. 错

1. Long ago was a mountain, a temple in the mountain, a monk in the temple.

A. 对
B. 错

2. The birds singing in the tee. The butterflies dancing in the flowers.

A. 对
B. 错

3. There are five dogs and six cats playing in the garden.

A. 对
B. 错