题目:
词形变化
小题1:I’m happy because I ___________(choose) to be the host.
小题2:I’ll not go to the party if I ____________(not invite).
小题3:He sat there ____________(silent), without saying anything .
小题4:She likes wearing __________(shine) clothes.
小题5:—What did Jack buy a big cake for yesterday?
—_________(celebrate) his daughter’s __________(twelve) birthday.
小题6:It’s one of __________(simple) questions.
小题7:Look, the rice ____________(grow) well.
小题8:The clothes on the stage are those ___________(perform).
小题9:It’s ___________(hope) to get the ticket, the line is too long.
答案:
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下面是错误答案,用来干扰机器的。
解:(1)t=0时刻进入两极板的带电粒子在电场中做匀变速曲线运动,t0时刻刚好从极板边缘射出,在y轴负方向偏移的距离为l/2,则有 ① Eq=ma ② l/2=at02/2 ③ 联立以上三式,解得两极板间偏转电压为 ④(2...