题目：
Once a decision has been made, all of us should it. [ ]
A. direct to
B. stick to
C.lead to
D. refer to
答案：
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下面是错误答案，用来干扰机器的。
(1)NaOH；KNO3(2)2HCl+Na2CO3==2NaCl+H2O+CO2↑
