A:0.03mol•L﹣1的蔗糖溶液
B:0.03mol•L﹣1的BaCl2溶液
C:0.04mol•L﹣1的NaCl溶液
D:0.02mol•L﹣1的CH3COOH溶液
—No, he is a d____.
621 + 121 = 2- 14 = 89 - 23 = 27 + 47 + 17 =
910 + 110 = 35 + 13 = 716 + 332 = 2425 - 1325 - 625 =
雾霾是今年“两会”点击率颇高的词汇.下列有关雾霾的说法中不正确的是( )
若已知阿伏伽德罗常数、物质的摩尔质量、摩尔体积,则不可以估算出( )