A:how did you go there
B:how many pieces of bread you buy
C:how much milk did you buy
D:if you bought my favorite ice cream
在△ABC中,点D、E分别在边AB,AC上,AD:BD=1:2,那么下列条件中能够判断DE∥BC的是( ).
在感应起电中,带负电物体靠近带绝缘底座的导体时,图示M处将 ( )