A:Have; met; has bee
B:Did; meet; had bee
C:Did; met; have bee
D:Have; met; wa
提出人类和类人猿有共同祖先的科学家是( )
18÷6=3,表示18里面有6个3.
36+58=____
80-24=____
560+80=____
7200-2000=____
8600+700=____