A:i1>i3,i2='0'
B:i1<i3, i2=0
C:i1=i3<i2
D:i1=i3,i2=0
若2am+2b2n+2与a3b8的和仍是一个单项式,则m与n 的值分别是( )
下图是分别表示甲乙丙丁四种物质熔化或凝固规律的图线,下列说法正确的是( )
_______ the teachers in their school is about 200 and one fourth of them are _______ teachers.