2. 外语
  3. If a substance is dissolved in water or heated, it may ______ a gas.

If a substance is dissolved in water or heated, it may ______ a gas.

admin2009-02-10  69
问题 If a substance is dissolved in water or heated, it may ______ a gas.
选项 A、give into
B、give over
C、give off
D、give away
答案C
解析 句意：如果一种物质溶解在水里或被加热，它可能释放出一种气体。give into为非固定搭配；give over意为“托付，交托”give off意为“散发”；gave away意为“送掉，分发(奖品)等”。
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