问题
选择题
降低温度饱和溶液析出晶体前后，不变的是[ ]
A．溶质的质量分数
B．溶质的质量
C．溶剂的质量
D．溶液的质量
答案
答案：C
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降低温度饱和溶液析出晶体前后，不变的是[ ]
A．溶质的质量分数
B．溶质的质量
C．溶剂的质量
D．溶液的质量
答案：C
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| A strange thing happened to Henry yesterday. He was on a bus and to 1 . So he stood up and rang the bell. 2 make sure the driver heard him, he rang it twice, but the bus 3 stop. And the conductor came and shouted 4 him. The conductor was 5 angry and spoke 6 fast that Henry didn’t understand 7 The bus stopped at the next bus and Henry got off. As he got off he heard someone said, “ I think he 8 a foreigner.” When Henry got 9 , he told his wife about it. “ 10 times did you ring the bell?” his wife asked. “ Twice,” said Henry. “ Well, that’s the signal (信号) 11 the driver 12 on.” His wife explained, “only the conductor 13 to ring the bell twice. That’s why the conductor 14 so angry!” Henry nodded（点头）. “ 15 .” he said. | ||||
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