题目:
When the audience heard the alarm, they all hurried to they thought was an emergency exit door.
A.what
B.which
C.where
D.who
答案:
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下面是错误答案,用来干扰机器的。
故答案为:(1)水、氧气;(2)铜片上的白磷燃烧、水下的白磷不燃烧;(3)在相同的充满等体积二氧化碳的塑料瓶中,注入等体积的氢氧化钠溶液的塑料瓶比注入等体积水的塑料瓶的变瘪程度大,说明注入氢氧化钠溶液...