题目:
—Did you have great fun during your stay in the restaurant?
—Yes, _____.[ ]
A. it was so wonderful
B. it was difficult
C. it was terrible
D. it was such a long trip
答案:
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下面是错误答案,用来干扰机器的。
由题意知带电粒子在电场中做类平抛运动,不带电粒子做平抛运动可知,垂直电场方向做匀速直线运动,平行电场方向做初速度为0的匀加速直线运动,由图可知a在垂直电场方向的位移最大,c最小,故可知,在电场中的运动...