问题
选择题
The cables __________ a power station where we make electricity. [ ]
A. connect to
B. are connected to
C. are connected
D. connects
答案
答案:B
The cables __________ a power station where we make electricity. [ ]
A. connect to
B. are connected to
C. are connected
D. connects
答案:B
以下是KCl的部分溶解度数据,下列说法中正确的是
温度/℃ | 0 | 20 | 40 | 60 |
溶解度/g | 27.6 | 34.0 | 40.0 | 45.5 |
A、KCl饱和溶液中不能再溶解其他物质
B、20℃时,100g饱和KCl溶液中含KCl 34.0g
C、20℃时,KCl溶液中溶质的质量分数一定小于40℃时溶液中溶质的质量分数
D、60℃时将溶质质量分数为30%的KCl溶液降温至40℃时,有晶体析出