问题
选择题
—How far apart do they live？
—________ I know, they live in the same neighbourhood.
A．As long as
B．As far as
C．As well as
D．As often as
答案
B
据我所知。
搜题请搜索小程序“爱下问搜题”
—How far apart do they live？
—________ I know, they live in the same neighbourhood.
A．As long as
B．As far as
C．As well as
D．As often as
B
据我所知。
某固态混合物中含有mgKNO3和若干不溶于水的杂质，将此混合物加入ng水中，在10℃、40℃、75℃时观察，充分溶解后的结果如下（溶解度曲线如图所示）：
| 温度 | 10℃ | 40℃ | 75℃ |
| 未溶固体 | 261g | 175g | 82g |
（1）m、n的值各为多少？
（2）75℃时所得溶液是否饱和？
（3）在什么温度将mg硝酸钾溶于ng水中恰好达到饱和状态？
