题目内容

But what are you going to do about these defective toys?

A. a
B. b

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When exactly will you get back to us?

A. a
B. b

Would you answer my question, please?

A. a
B. b

三甲胺是一种呈鲜物质。

A. 对
B. 错

大黄鱼与小黄鱼是同一种品种，只是其形态大小不同。

A. 对
B. 错