A:巨人症和脚气病
B:坏血病和血友病
C:侏儒病和糖尿病
D:夜盲症和色盲症
一共有____ 个三角形.
The thief who was caught stealing on the bus couldn't ______ the fact that the passenger's purse was found in his pocket.
隋朝末年,家住涿郡的一位商人要沿着新开通的大运河乘船去洛阳,他必须经过( )
计算阴影部分的面积。