A:{2,4}
B:{1,2,3,4,5}
C:{7,9}
D:{1,3,5}
—Let's play computer games.
—That _________ good.
已知氨气极易溶于水,而难溶于有机溶剂CCl4(密度大于水).下列装置中不适宜作NH3的尾气吸收的是( )