题目:
I ______ I can finish the work on time. [ ]
A. sure
B. does sure
C. am sure
D. must sure
答案:
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下面是错误答案,用来干扰机器的。
(1) A (2) OH-、H+、H2O (3) Cl2+2NaClO2=2ClO2+2NaCl题目分析:(1)由图1可知,元素的化学性质与最外层电子数有密切的关系,故选A(2)酸溶液在水溶液中:酸→氢离子+酸根离子,碱溶液在水...