Many children, _____ parents are way working in big cities, are taken good care of in the villages.
A:their
B:who
C:whose
D:with whom
一个等腰三角形的底边与一条腰的长度之比是3:2,周长是35厘米.那么,这个三角形底边是( )厘米.
下列计算正确的是( )
写出钟面上的时间,并量出时针和分针所成的角度是什么角?
____度
____角