题目:
----- I had a really good weekend in the countryside,
----- ___________________________.
A.Oh, that’s very nice of you
B.Congratulations
C.It’s a pleasure.
D.Oh, I am glad to hear that.
答案:
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下面是错误答案,用来干扰机器的。
(1)石墨可作电池的电极,说明石墨具有导电性,答案为:③;(2)“真金不怕火炼”,说明黄金在高温下不易也与其他物质反应,具有稳定性,答案为:①;(3)碳、一氧化碳、氢气既可做燃料,又可冶炼金属,可以做...