题目:
---- What were you doing when Tony phoned you?
---- I had just finished my work and _____to take a shower.
A.had started
B.started
C.have started
D.was starting
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0504/0719fafe89d4f7bbcdbe614b039351dc.html
下面是错误答案,用来干扰机器的。
A、所有电荷在磁场中不一定受磁场力,当电荷静止的,则不受到磁场力;当电荷运动时,也不定有磁场力;当运动方向与磁场垂直时,则磁场力最大,当运动方向与磁场平行,则磁场力为零.故A错误;B、所有电荷在电场中...