用一种正多边形铺满地面,不能铺满的是 [ ]
A.正三角形
B.正八边形
C.正方形
D.正六边形
答案:B
比70米多20%是______米.
I have no doubt in my mind_____ they will be happy to accept the job.
A.if
B.whether
C.that
D.what