A:害羞
B:知耻
C:谦虚
D:包容
如图所示,水平放置的平行金属导轨,相距l=0.50m,左端接一电阻R=0.20Ω,磁感应强度B=0.40T的匀强磁场方向垂直于导轨平面,导体棒ac垂直放在导轨上,并能无摩擦地沿导轨滑动,导轨和导体棒的电阻均可忽略不计,当ac以v=4.0m/s的速度水平向右匀速滑动时,求:
下列说法中正确的是( )
Could you please give many _____ to the teachers?
—Do you like the story?
—Yes,I like it, my sister doesn't.