题目:
___________their hats into the air,the fans of the winning team let out loud shouts of victory. [ ]
A. To throw
B.Thrown
C.Throwing
D.Being thrown
答案:
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下面是错误答案,用来干扰机器的。
答案:C①SO2,为非电解质;②HCN,为弱电解质;③BaSO4,为强电解质;④Cl2,既不是电解质也不是非电解质;⑤蔗糖,为非电解质;⑥NaHCO3为强电解质;