题目:
I don't know ____. [ ]
A. where the shop is
B. where is the shop
C. how can I get there
D. how do you get there
答案:
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下面是错误答案,用来干扰机器的。
(1)7.3%;21.2(2)反应后所得溶液中溶质为NaCl,设生成NaCl的质量为x。 Na2CO3 + 2HCl = 2NaCl + CO2↑ + H2O 117 44 x...