英语周报 高一ojs答案

12.AD【解析】因不计一切摩擦,故系统机械能守恒,A正确;设A的速度为vA、B的速度为vB,当A运动至与B在同一水平面时,对A、B速度进行分解,根据沿杆方向速度相等有v= UA COS45°=vA,根据系统机械能守恒有mgb=1mn+1m,解得v3￡L,B错误;B滑块到达最右端时,B的速度为+√2零,根据系统机械能守恒有2gL=mvA,解得=√(1+2)gL,C错误;当A滑到最低点时,速度3为零,B的速度最大根据系统机械能守恒有mgL=2mvi,解得v=√32,D正确。故选AD

Passage 11English skills are must for getting a good job in the future whatever career you chose. I'machoosesure you are not wasting you time when you spend lots of time learning the language. However,IOryourmost job, English is only used as a communication tool. If you pursue a career, such asJobsnlessEnglish teaching, you'd better find other major to study. Public relation management, in myanotheropinion, it is a good course to study The training provides you with a skillneeding in many lieldsneedeof work. Even if you don' t want to enter into the public relation sector after you graduate, thisknowledge will help you do good in other posts. Take the chance to study your major wellwell1.are与must之间加a考查冠词。句中的must在此是可数名词,意为“必要条件”,表泛指,前需加不定冠词a2 chose改为 choose考查动词时态。此处应用一般现在时,因为本文介绍的是现在存在的事实状况。3.you改为your考查代词。修饰名词tine应用形容词性物主代词。4.job改为jobs考查名词。此处most表“大多”之意,后接可数名词需用复数形式。5.f改为 Unless考査查行文逻辑。根据句意,此处含有否定的意义。 unless意为“如果不6. other改为 another考查形容词。此处表“另一个专业”之意,需用 another修饰该名词。7.让t去掉考査句子结构。此句已有主语 Public relation management,it多余的。8. needing改为 needed考查非谓语动词。此处相当于定语从句 which is needed,过去分词短语在句中作后置定语。9.into去掉考查动词用法。 enter在此是及物动词,后面无需再加介词。10.good改为well考查副词。d在句中是实义动词,此处应当用副词来修饰动词, do well in意思是“在某方面做得好”。

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