题目

________, the girl couldn't get the door open. A . Try might as she B . Try as she might C . Might as she try D . Try although she might 答案：B下列各组气体中，均能用固体NaOH干燥的一组是（ ）A．H2、O2、COB．H2、O2、CO2C．H2、SO2、CO2D．O2、CO、CO2