阅读率
参考答案：
是指在固定时间内阅读特定刊物的人口占总人口的比率。
In recent years travel companies have succeeded in selling us the idea that the further we go, ____ . [ ]
A. our holiday will be better
B. our holiday will be the better
C. the better our holiday will be
D. the better will our holiday
燃煤发电厂利用反应2SO2+2CaCO3+X=2CaSO4+2CO2来减少SO2的排放，其中X的化学式为
A．O2
B．CO
C．CO2
D．H2
