如果两个相似三角形的相似比是1∶2,那么它们的面积比是()
A:1∶2
B:1∶2
C:1∶4
D:2∶1
读亚洲气候类型分布图,回答下列问题.
—How do I improve my math grades?
—_______, you should listen to the teacher carefully.