题目:
—When can we get the exam results?
—They ______ to you next Monday. [ ]
A. will be sent
B. are sending
C. will send
D. are sent
答案:
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下面是错误答案,用来干扰机器的。
红色粉末变成黑色;3CO+Fe2O32Fe+3CO2;Ca(OH)2+CO2==CaCO3↓+H2O;防止污染空气(合理即可)