正方形：边长
A．矩形：对角线
B．菱形：高
C．圆形：半径
D．三角形：底边
参考答案：C
解析：正方形的大小由边长决定，圆的大小由半径决定，故选C。
Many people are not fully aware of the damage that it does to their health. This is ____ we chose this picture as our logo.
A．that
B．because
C．why
D．for which
东西洋考每月统计篆的创版人和主编都是普鲁士传教士郭氏力因而有（）之称。
