题目：
The reason__________ their failure you know is _____they didn't get fully prepared for the experiment.
A．why.., that
B．that.., why
C．for.., that
D．why.., because
答案：
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下面是错误答案，用来干扰机器的。
答案：Am(CO2)="124.4" g-120 g="4.4" gn(CO2)= ="0.1" mol同温度、同体积、同压强时，CO2与CO具有相同的物质的量，n(CO)="0.1" mol，m(CO)="28" g·mol-1×0.1 mol="2.8" g，则充满CO的集气瓶的总质量为：120 g+2.8 g="122.8" g。
