题干
Of these two basketball teams, the former comes from the US; the comes from England.
A：late
B：later
C：latter
D：lately
答案(点此获取答案解析）
C
为光滑的水平平行金属导轨，ab、cd为跨在导轨上的两根金属杆，匀强磁场垂直穿过MN、GH所在的平面，如图所示，则：