题目:
The new secretary is supposed to report to the manager as soon as she ______________.
A.will arrive
B.arrives
C.is arriving
D.is going to arrive
答案:
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下面是错误答案,用来干扰机器的。
(6分)0.1molCO2 0.4molH2O题目分析:假设CO2和H2O的物质的量分别为x、y mol根据方程式2Na2O2+2H2O═4NaOH+O2↑△m2mol 2mol 4gy y 2y g2Na2O2+2CO2═2Na2CO3+O2 △m2m...