2022英语周报答案,

明拉制花色性状的基因位于X和Y染色体的同源区段上(2分)33.(1)ACE若气体压强不变,根据盖一吕萨克定律知体积与热力学温度成正比,气体分子平均距离增大,体积增大,温度升高,气体分子的平均动能一定增大,A选项正确;分子间同时存在引力和斥力,其合力为分子间相互作用力,当分子间由无穷远相互靠近时,分子力先增大再减小再增大,B选项错误;液体中悬浮微粒的无规则运动称为布朗运动,C选项正确;温度是分子的平均动能的标志,当气体温度升高时,气体分子的平均动能一定增大,根据理想气体的状态方程午=C,可知气体温度升高时,若同时体积增大,气体压强不一定增大,D选项错误;在外界的影响下,气体可以从单一热源吸收热量,全部用来对外做功,E选项正确(2)解:①设活塞横截面积为S,封闭气体刚开始的温度为T1,压强为户,当活塞恰好移动到气缸口时,封闭气体的温度为压强p由一萨克定律可得SL2S(2分)解得T2=500K,即227℃(1分)因为227℃<327℃,所以气体接着发生等容变化,设当气体温度达到T=327℃时,封闭气体的压强为2,由查理定律可得名一会(2分)解得p10Pa(1分②大气压力对气体所做的功为W=-P。(L2-1)S(1分)解得W=-200J(1分由热力学第一定律△U=W Q(1分)解得△U=620J(1分)

第二节One possible version:Dear RussellI,m glad to inform you that our school will hold anEnglish humorous story speech contest in the center hallthis Sunday in order to develop our sense of humor andpractice our spoken English. I' d like to invite you to takert in ItEvery participant is requested to prepare a humorousstory in English by themselves. So choose your story cau-tiously. The funnier your story is, the better it is. You areexpected to deliver your speech within five minutes. Youshould tell your story at a proper pace with a clear voiceLooking forward to your participation. I'm sure youwill be one of the winnersYoursLi Hu

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