英语周报八年级2022-2023新目二答案

英语周报八年级2022-2023新目二答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本站。

【解析】(1)画出粒子运动的示意图,由几何知识可得粒子运动的半径r=R(2分)根据牛顿运动定律可得qvB=分解得(1分x60(2)粒子在磁场中做速闶周运动的周蚵TnBs(2分)粒子在磁场中运动的圆心角为60°,故粒子在磁场中运动的时间=6-3aB3(1分〕(3)粒子进入电场后做类平拋运动,o=ma(1分R=-d(1分)(1分解得x=2BR(1分)

第二节:参考范文I couldn t belieze it! I wasn t punished and I got my very own bird field guide. It s the very one that I hadbeen saving up money to buy. Then, I gave the money I had to my teacher to help buy a new window. But shekept refusing tmy ideal, saying I should spend the tmoney buying some necessities of study. So after school. Iwent home with my own field guide and a new motivation.No, many years hazr passed. The look is still in my drawer. but my wonderful teacher hasway. Thanks to her reward and encouragement. I l ecome the man who i want. All of that day that remains ismy memory and the lesson my teacher taught me. That lesson stays with me every day and I will remember itforever. Im so lucky to have met such a great teacher.评分原则1.本题总分为25分,按5个档次给分2.评分时,先根据所续写短文的内容和语言初步确定其所属档次,然后以该档次的要求来衡量、确定或调整档次,最后给分3.词数少于130的,从总分中减去2分1.评分时,应主要从以下四个方面考虑:

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