题目内容
(请给出正确答案)
[单选题]
42、一带电粒子平行磁感应线射入匀强磁场,则它作___运动; If a parallel magnetic induction line of the electric particle is injected into the uniform magnetic field, it will move ___.
A.直线; straight lines;
B.变速率圆周; speed change rate of the circumference;
C.匀速率圆周; uniform speed of the circumference;
D.螺线; spiral;
答案
A、直线; straight lines;
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