问题
选择题
单项选择。
It's time ______. [ ]
A.to get school
B.get to school
C.for school
D.get to school
答案
答案:C
单项选择。
It's time ______. [ ]
A.to get school
B.get to school
C.for school
D.get to school
答案:C
KCl是一种常用的钾肥,其溶解度如下表.下列说法错误的是( )
温度/℃ | 0 | 20 | 40 | 60 |
溶解度/g | 27.6 | 34.0 | 40.0 | 45.5 |
A.KCl饱和溶液中能再溶解其他物质
B.20℃时,100gKCl饱和溶液中含KCl34.0g
C.40℃时,KCl饱和溶液的质量分数为40.0%
D.60℃的KCl饱和溶液降温至20℃,有晶体析出