为除去氢气中混有的少量水蒸气和氯化氢气体,应将此混合气体先通过 ____________ ,再通过 。
氢氧化钠溶液;浓硫酸
The girl doesn't do any housework ______ Monday ______ Friday.[ ]
A. on; on
B. from; and
C. from; to
D. of; to
人口出生率