2021-2022 英语周报 高一 牛津 36答案

第一节One possible versionDear Ms JenkinsI'm writing to ask you for help. Our school is going to sponsor an exhibition of Chinese paintings in theschool library next month. As president of the student council, i have been assigned the job of drafting an arnouncement in English as there aredreds of international students in our schoohave already written a rough draft of the above-mentioned announcement. But I'm afraid that there aresome mistakes in the English language. So I am hoping you would correct my possible mistakes in the announce-ment that i have attachedId appreciate it if you could do me the favocerely yourLIH

33.[物理——选修3-3](1)ABE(5分)解析:温度升高,气体的内能增加,Δ>0,A项正确;作出状态A、B所在的等容线,可判断状态A的体积小,状态B的体积大,系统对外界做功,W<0,故B项正确,C、D项错误;Q=Δ一W,Q>0,E项正确(2)解:①热气球能产生的最大升力F=pVg=6000N(2分)故至少要排除的空气的质量为100kg,占V解得T2=360K(2分)故须将气球内的空气加热到t=87℃。(1分)②由,解得V=1.5V(2分)热气球此时能产生的最大升力F=2000N又f+mag=F故空气阻力f=1000N(2分)气球上升的最大速度cm==1m/s(1分)

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