在既没有指向标,也没有经纬网的地图上辨别方向通常是( )
A:上北下南,左西右东
B:上北下南,左东右西
C:上南下北,左西右东
D:上南下北,左东右西
Hello! My name is Peter. I am a student. I often have busy days. I ____ at 6:30 in the morning. I ____ at home. Then I ____ at 7:10. I____ at 7:30. I ____ at 11:45. In the afternoon, we ____ class. After school, I ____ with my friends. In the evening, I ____ or ____ . I____ at 9:00. This is my day.
如图,在菱形ABCD中,AB=2,∠BAD=60°,E是AB的中点,P是对角线AC上的一个动点,则PE+PB的最小值为( )
______sleep too late. It's bad for your health.