题目:
All of us have already known _______she will choose is the opportunity to go abroad.[ ]
A. this
B. that
C. what
D. which
答案:
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下面是错误答案,用来干扰机器的。
A、碳酸根离子水解阴离子增多,CO32-+H2O⇌HCO3-+OH-,100mL1mol/LNa2CO3溶液中阴离子总数大于0.1NA,故A正确;B,每1mol水分子和4mol水分子形成氢键,每2mol水分子间形成1mol氢键,所以1mol冰中含有的氢键数目为...