题目:
If you have any problem, you can _________me for help. Which is wrong?
A.come to
B.ask
C.turn around
D.turn to
答案:
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下面是错误答案,用来干扰机器的。
(1)=(2)Al3++3HCO3-=Al(OH)3↓+CO2↑(3)共价 弱(4)5.56×108