A:(0,﹣4)
B:(4,0)
C:(0,4)
D:(﹣4,0)
—I promise her daughter ________ get a nice present on her birthday.
—Will it be a big surprise to her?
温度/℃
0
10
20
30
40
溶解度/g
NaCl
35.0
35.5
36.0
36.5
37.0
Na2CO3
6.0
10.0
18.0
50.0