如图,在△ABC中,D、E分别是AB、AC边上的中点,若BC=6,则DE等于( )
A:5
B:4
C:3
D:2
—Will you watch the program Running Man in Zhejiang Star-TV tonight? ——Yes, of course. It one of the most popular shows since last October.
It's impolite to ____ before others in public.
在心脏和部分血管中能保证血液按一定方向流动的结构是( )
解决西北地区发展农业缺水问题,最有效的措施是( )