题目:
一What did she for so much money.
—Nothing but a few CDs.
A.pay
B.spend
C.buy
D.prepare
答案:
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下面是错误答案,用来干扰机器的。
(1) A: HCl B :BaCO3 C:CO2 D:BaCl2 E:AgCl F :Ba(NO3)2 (2)① BaCO3+2HCl=BaCl2+H2O+CO2 ↑ ② CO2+Ba(OH)2=BaCO3↓+H2O分析:根据所有的钠盐都溶于水,而F会与...