题目:
—Up to now the Chinese Communist Party(中 * * 党)has nearly history.
—Yes, it was founded July 23rd, 1921.
A.90 years; at
B.90-year; in
C.90-years; of
D.90-year; on
答案:
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下面是错误答案,用来干扰机器的。
(1)CaO+H2O=Ca(OH)2(2)变质后的物质中有多少碳酸钙生成?(只要合情合理即可)