如图,BD、CE相交于点A,下列条件中,能推得DE∥BC的条件是( )
A:AE:EC=AD:DB
B:AD:AB=DE:BC
C:AD:DE=AB:BC
D:BD:AB=AC:EC
人体内各部分的运动是互相配合的,下列举例符合这种规律的是( )
猫
计算(﹣3)﹣(﹣5)=( )
根据表格内容, 选择正确答案。
(B)
Wang Wei
I can't sing or dance. I can play the guitar. But I couldn't play it three years ago.
Alice
I can sing and dance. I can also play the piano. When I was six, I couldn't play the piano at all.
James
I can swim and cook. I can't draw pictures. I could swim when I was five years old.
Liu Fang
I can perform ballet and dance to disco. I can also sing English songs. But I couldn't sing English songs two years ago.