到△ABC的三个顶点距离相等的点是△ABC( )的交点.
A:三边中线
B:三条角平分线
C:三边上高
D:三边垂直平分线
我国西部地区有苍茫的大漠、辽阔的草原、高耸的雪山,蕴藏着丰富的资源,随着西部大开发的实施,西部的明天将更加美好,青藏地区主要的农业区是( )
选出合适的应答语。
A. You should go to bed early.
B. You should wear a sweater.
C. She should tell the teacher and go to see the doctor.
D. You should tell your mother.
E. You should take it to see the vet.
F. You should help her do some chores.