题型:问答题 简答题 (A)如图所示,a、b、c、d为某一电场中的四个等势面,一个带正电粒子在只受电场力作用下,从M点运动到N点,则( )A.四个等势面电势关系为Ua<Ub<Uc<UdB.四个等势面电势关系为Ua>Ub>Uc>UdC.该粒子在N点的动能较小,电势能较大D.该粒子在N点的动能较大,电势能较小 查看答案
题型:问答题 简答题 —Do you know ______ the girl in red is? —I'm not sure, but she looks like a teacher. [ ]A. how old B. what C. who D. where 查看答案