A:will be calling
B:will call
C:call
D:am to call
温度/℃
0
10
20
30
40
50
60
70
80
90
100
NaCl
35.7
35.8
36.0
36.3
36.6
37.0
37.3
37.8
38.4
39.0
39.8
NH4Cl
29.4
33.3
37.2
41.4
45.8
50.4
55.2
60.2
65.6
71.3
77.3
关于x的多项式(m-1)x3-2xn+3x的次数是2,那么m=____ ,n=____