_____ is known to us all, Yao Ming is an iconic( 偶像的) figure of Chinese basketball . A. What B. As C. It D. which 答案:B已知硝酸钾在不同温度下的溶解度如下表:
温度/℃
0
10
20
30
40
50
溶解度/g
13.3
20.9
31.6
45.8
63.9
85.5下列说法不正确的是( )A.20℃时,KNO3的溶解度为31.6gB.KNO3的溶解度随温度升高而增大C.30℃时,在100gKNO3饱和溶液中含有45.8g溶质D.将40℃的饱和KNO3溶液降温至20℃,一定有晶体析出