试题与答案

在我们生活的地球周围,每时每刻都会有大量的由带电粒子组成的宇宙射线向地球射来,地

题型:选择题

题目:

在我们生活的地球周围,每时每刻都会有大量的由带电粒子组成的宇宙射线向地球射来,地球磁场可以有效地改变这些宇宙射线中大多数带电粒子的运动方向,使它们不能到达地面,这对地球上的生命有十分重要的意义.若有一束宇宙射线在赤道上方沿垂直于地磁场方向射向地球,如图所示,在地磁场的作用下,射线方向发生改变的情况是(  )

A.若这束射线是由带正电荷的粒子组成,它将向南偏移

B.若这束射线是由带正电荷的粒子组成,它将向北偏移

C.若这束射线是由带负电荷的粒子组成,它将向东偏移

D.若这束射线是由带负电荷的粒子组成,它将向西偏移

答案:

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①孙中山;②陈独秀

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