下列物质露置在空气中一段时间后,质量会减轻的是[ ]
A.生石灰
B.浓盐酸
C.浓硫酸
D.大理石
答案:B
Students should keep good habits. Don't depend _____ parents. [ ]
A. on
B. in
C. about
D. for
患者应出院而不出院的,应如何处臵?