2. 外语
  3. If a substance is dissolved when heated, it may______a gas at the same time.

If a substance is dissolved when heated, it may______a gas at the same time.

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问题 If a substance is dissolved when heated, it may______a gas at the same time.
选项 A、give off
B、give over
C、give in
D、give away
答案A
解析 动词词组辨析题。give off意为“散发，释放”；give over意为“托付，交托”；give in意为“屈服，退让”；give away意为“送掉，分发(奖品)”等。根据句意选择A。
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