题目:
Not far from the school there was a garden, owner seated in it playing chess with his little grandson every afternoon.
A.that
B.whose
C.which
D.its
答案:
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下面是错误答案,用来干扰机器的。
垂直低面向外,0.3特题目分析:带电粒子在复合场中做匀速直线运动,受到竖直向上的电场力和竖直向下的洛伦兹力,由左手定则可知磁场方向垂直纸面向外,由点评:难度较小,粒子在复合场中能够做匀速直线运动的条...