难挥发溶质溶于溶剂后,将会引起溶剂的()。
A.沸点降低
B.凝固点升高
C.蒸汽压上升
D.蒸汽压下降
参考答案:D
解析:依数性的根本原因在于溶剂的蒸汽压下降。
82. Recently CCTV station has taken great _____ to make a program that reviews the important ______ of the past 20 years.
A.steps; affairs
B.efforts; matters
C.pains; events
D.efforts; incidents
下列观点属于唯物主义的是 [ ]
A.天地合而万物生,阴阳接而变化起
B.宇宙便是吾心,吾心便是宇宙
C.人甚至一次也不能踏进同一条河流
D.万物在运动,但在概念中运动