33.(1)1.43×10-(2分)引力(2分)大于(1分)解析:由题可知,一滴油酸的总体积为1×20×200cm2.5×10-5=2.5×10-3cm3,则油酸分子的直径为10175m=1.43×10-m;液体表面的张力,是因分子间作用力表现为引力;当分子间作用力表现为引力时,分子间距大于液体分子的平衡距离(2)1取Ⅰ气体为研究对象,气体发生等压膨胀,当其体积为2L0S时,B开始移动,由盖一吕萨克定律得。ST。2L。S解得:T1=2T。;(4分)i.Ⅱ气体初态压强为:P2=P对Ⅱ由等温变化,应用玻意耳定律:P2LaS=P2L。S解得:P2=2PI气体此时压强:P1=P2=2P对I由理想气体状态方程:(其中P1=P0)P1LsP1×L0ST解得:T1=5T。(6分

Writing 3Dear JamesI am glad to have received the book Biogra phy o/Lincoln you bought for me. I like it very much and amwriting specially to express my thanks for your kindness.You know, Lincoln is my hero. He came from a poorfamily and had only several monthseducationHowever, he became a present of the United States. Whata great man! When I received the book, I felt more thanexcited. That was not only because you sent me a birthdaresent but also because it was the exact book I wantedYou are so thoughtful!Thanks again and best wishes to youYLi h

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