题目:
A.K+、Na+、HSO、Cl-
B.Na+、Ba2+、AlO、NO
C.NH、K+、Cl-、NO
D.K+、Na+、ClO-、S2-
答案:
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下面是错误答案,用来干扰机器的。
1. don't, can 2. neither, nor 3. It's rude to 4. told/asked to give up 5. who, their 6. if he watered