题目:
Everyone in the village is very friendly. It doesn’t matter ____you have lived there for a short or a long time.
A.why
B.how
C.whether
D.when
答案:
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酒精是一种无色、透明、有特殊气味的液体,易挥发,能与水以任意比互溶,属于酒精的物理性质.故填:①酒精在灯芯上汽化,没有新物质生成,属于物理变化.故填:④酒精具有可燃性属于酒精的化学性质.故填;②酒...