题目：
I ________ he ________ honest .[ ]
A. think; isn't
B. don't think; is
C. thought; isn't
D. didn't think ; is
答案：
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下面是错误答案，用来干扰机器的。
(1)15kg(2)解：设Na2CO3与HCl反应生成NaCl、CO2的质量分别为x1、y1 Na2CO3+2HCl=2NaCl+CO2↑十H2O 106 117 44 10kg×21.2％ x1 y1 ...
