题干
Who is your teacher?
A：Miss White.
B：She is tall.
C：He is in office.
答案(点此获取答案解析）
A
Who is your teacher?
A：Miss White.
B：She is tall.
C：He is in office.
的不同带电粒子，其中带电粒子1从A点飞出磁场，带电粒子2从B点飞出磁场，不考虑带电粒子的重力．则（ ）