2022英语周报第5期高考答案

第四部分At seven o'clock on last Sunday, my friends and Istart off from my home with food and water for a moun-startedtain clim bing It took them about an hour to got to the footof the mountain by bike. At eight we began to climb themountain, talk and laughing. One and a half hour later,talkinghoursve reached the top of the mountain, where we sanggether, told stories but even played some funny gamesAfter that we put that we had taken on a piece of clothand had a big lunch, Then at a bout two o' clock in the afternoon we began to go back home, tired but happily.appy71.删除on考查介词。 last Sunday可以直接作时间状语,前面不需要加介词72. start→ started考查动词时态。根据时间状语lastSunday可知,谓语动词应用一般过去时态73.them→-us考查代词。结合上下文语境可知,人称代词them使用错误,应改为us74.got→get考查非谓语动词,不定式符号to之后接动詞原形75. talk--talking考查非谓语动词。此处为非谓语动词短语在句中作伴随状语。76.hour- hours考查名词复数, one and a half hours为常用表达,意为“一个半小时”。77. but-and考查并列连词,根据语境可知,转折连詞but使用错误,应改为and。78.第二个that→what考查宾语从句,what引导宾语从句,并在从句中作宾语79.bg前添加a考查冠词。名词 lunch之前有形容词修饰,且在句中表示泛指,故之前添加a。80. happily-- happy考查形容词。此处用形容词 tired和hap py作状语。

7.B【解析】带负电的小球所受电场力水平向左,因此电场方向水平向右,A项错误;带电小球在竖直方向受重力作用做匀减速运动,水平方向受电场力作用做匀加速运动,由运动学公式有vy=v=gt,v2=2v=atEm,可得E=2mg,因此带电小球所受电场力的大小是其所受重力的2倍B项正确;竖直成的位移h=。t,水平方向的位移x2ve=vt,因此有x=2h,对小球由动能定理有qEx-mgh=△E=2my2,联立上式可解得电场力做的功W=gEx=2m2,因此电场力做正功,电势能减少了2m2,由W=qU得qUN=2mr2,解得M=-m,故C、D项错误

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