一幅地图上用5cm表示20km,这幅图的比例尺是______.
因为20千米=2000000厘米,
则5:2000000=1:400000;
故答案为:1:400000.
Their tent,__________ light as a feather, remained firm in the storm last night.
A.as if
B.even
C.though
D.if