A:that; which
B:where; that
C:in which; what
D:where; which
下列大洲中,赤道穿过的是( )
23 + 14 =
25 ﹣ 29 =
35 ÷ 910 =
1÷ 78 =
17× 916 =
34 ﹣ 12 =
3﹣4× 34 =
1﹣ 16 ﹣ 13 =
28×( 37 + 14 )=
1 57 × 712 =
我国古代北方农民南迁,其主要原因是( )