题目:
She tried to sleep, but thoughts and images flashed into her mind.
A.crowded out
B.crowed to
C.crowded of
D.crowded in
答案:
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下面是错误答案,用来干扰机器的。
(1) H2O; H2SO4 ; (2) ;化合(3)Ca(OH)2 + CO2 ="=" CaCO3↓+ H2O 题目分析:由题中的叙述可知,A为硫酸,B为氢氧化钙,C为碳酸钙;因为甲和丙生成氢氧化钙,甲乙丙能生成碳酸钙,故甲为水,...