2022七年级下册英语周报第31期答案

33.(1)【答案】BDE解析】气体的摩尔体积与阿伏伽德罗常数的比值是气体分子占据的空间体积,不是气体分子的体积A项错误;温度是平均动能的标志,温度高,分子的平均动能大,B项正确;单晶体具有规则的几何外形,多量体没有规的几何外龙,单晶体具有备向异性,多晶体具有各向同性,C项错误:饱和汽压与温度有关,温度越高,饱和汽压越大,D项正确,一切与热现象有关的宏观过程都具有方向性,是不可逆的,E项正确。(2)解:(1)设需要充人的外界气体的体积为V,根据理想气体状态方程o(V+V1)P(2分)T代入数据可得V1=4m2(2分)()根据等底变化,由=(20分)中三桌可求得每次释放的气体在压强为P、温度为300K时的体积y=06m(1分由=Pm(2分)一一代入数据可得n=5(1分)工

Dear Sir or MadamI have heard that you are to be the architect for thenew library in our city. Considering the needs of dissabledpeople, I would like to offer several suggestionsIn my opinion, we should treat the disabled withrespect, which will make them feel comfortable. To beginwith, I suggest a ramp that is suitable for wheelchairs bedesigned at the entrance to the library, and special passages as well as toilets that the disabled adapt to should bebuilt so that they can use them easily. Besides, readingrooms should be on the first floor. This will make; it convenient for them. What's more, all the computers should beequipped with special software for the blind. In (dditionbook shelves should be designed to be reached by people, inwheelchairhus, they can have access tothele books freely.I hope you will find these suggestions practicalYours faithfullyLi hua

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