【题目】Be careful about these chemical(物质），For they might be poisonous.
在线课程【答案】substances
【解析】句意：小心这些化学物质，因为他们可能有毒。These修饰复数名词名词，故填substances 。
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Be careful about these chemical.For they might be poisonous.
编辑：chaxungu时间：2026-04-27 03:09:58分类：高中英语题库
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