内分泌腺的特点是()
A.有导管
B.无导管
C.血管少
D.体积大
E.血流快
参考答案:B
我们学校的运动场跑道一圈是250米,那么4圈就是______米.
The little girl always the windows in class. This her teacher very angry(生气的)
A.looks out, makes
B.looks out at,making
C.looks out of,makes
D.looks like,make