七上英语周报2022-2022答案

第四部分写作第一节One possible version.Dear JonahHow are you? I'm writing to share my favorite book with you. My favorite book is called How to improveEnglish writing, whose cover is white and yellow, including 126 pages. it's a birthday gift from my sisterLast term i did poorly in an important English test, which upset me. My sister sent me this book andncouraged me to improve my writing. From then on, I spent more time in writing. Thanks to the book,have made great progress in writing. I love this book.Best wishes!YoursLi Hua第二节One possible versionHours passed when my mom asked suddenly, Where's the dog? "Kleo was a quiet dog for the most part, soit took us time to realize he wasnt in the calk evgot very worried. Did anyongecar at our last stop? " Mom asked. None of us had. Mom phoned the gas station, but by that time they hadclosed for the day and there was no answer. So we turned around and headed back to that gas station as fastas we couldWe went all the way back to the gas station but couldn't fins Kleo. My sister and I were crying. Sure we'dnever see him again. We pulled into the gas station parking lot, and as our lights swept the station, we sawKleo. He was sitting in front of the dark station, very wet, patiently waiting for our return My mother jumpedout and opened the back door. We had no blankets, so she wrapped him in her sweater. We all laughedhappily and told him what a good dog he was

4.(1)根据洛伦兹力充力BBB棒的角速度最小值为(2)根据洛伦兹力充当心力B可得粒子离开加速器的速度为BaR法去拉第电磁感应定律,导体棒切割感线的电动势为:E5-20m=9BL2長据动能定理NEng得加速的次数为BLBR3)带电粒子在电场中的加速度为a、Eq g粒子在电场中做匀加速直线运动,满足Nl=-ar为保证粒子一直加速,应满足t≤解得:d≤TB. Z2BR

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