20222028英语周报49答案

第二部分:参考范文was stuck for five or six minutes though it felt much longer. How I wished I had not actedo foolishly, making myself a laughing stock of my family! I could well imagine how they wouldok when my head come out. Seeing my repeated efforts but in vain, Jason rushed out of theoom and turned to Dad for help. Seeing me caught in such a situation, Dad was unexpectedlysurprised, but soon surprise transformed into laughter. He tried my approaches, and eventuallymanaged to gt my head out by carefullythe pumpkin open with a knife. Just when I feltrelieved to be freed form the pumpkin, I suddenly found that mon should be shooting all thathappened to me and would upload it onlineThat video was posted online the Monday before Halloween. It went viral immediately. Justwithin hours, hundreds of likes and funny comments appeared, showing their enthusiasm.Constant streams of curious people even came by to take photos with us and my prized pumpkinJson was really excited and Mon was glad that her video should become such a hit and thus greweven crazier about shooting videos. But for me, though a little embarrassed, I soon totally forgotInforgettable"incident and set out for the trick-or treating. i would like to take it as a treat toadd joy and un to this festive Halloween for everyone.原作续写I was stuck for five or six minutes though it felt much longer. The video cuts before myrescue Dad got me to push my head farther into the pumpkin so Mom could reach in and undonytail. I emerged withose plugged with pulp(糊状物)hat Facebook video went up the Monday before Halloween, and by the end of that day it hadover 1.000People asked MonYou Tube, and by wednesdaygetting 5then the international me.- the video startedracking up hundreds of thousands of views. When I went on a youth camp, I was rebychildren I've never net. The pumpkin also became a minor celebrity. Passers-by and trick-orwould knock and ask, "which is Rachel's pumpkin? "before taking selfies with itAlthough our pumpkin carving the following year was a more sedate affair, I wouldn't sayhide-and-seek and became hopelessly jammed It was Dad who responded to my cries for achorearned my lesson. A few months later I squeezed myself into a laundry basket during a game

8.C【解析】射入磁场的离子比荷相等,但质量不一定相等,故射人磁场时初动能可能不相等,又因为洛伦兹力不做功,这些离子从射入到射出动能不变,故不同离子的动能可能不相等,A项错误;离子在磁场中的运动半径为rB由于离子的比荷和速率都相等,磁感应强度B为定值,故所有离子的运动半径都相等,B项错误;同时,各离子在磁场中做圆周运动的周期T=qB也相等,根据圆内较长的弦对应较大的圆心角可知从Q点射出的离子偏转角最大,在磁场内运动的时间最长,C项正确;沿PQ方向射入的离子不会从Q点射出,故偏转角不是最大,D项错误。

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