如图所示,绝热汽缸倒扣放置,质量为M的绝热活塞在汽缸内封闭一定质量的理想气体,活塞与汽缸间摩擦可忽略不计,活塞下部空间与外界连通,汽缸底部连接一U形细管(管内气体的体积忽略不计)。初始时,封闭气体温度为T0,活塞距离汽缸底部为h0,细管内两侧水银柱存在高度差。已知水银密度为ρ,大气压强为p0,汽缸横截面积为S,重力加速度为g。求:
(1)U形细管内两侧水银柱的高度差;
(2)通过加热装置缓慢提升气体温度使活塞下降Δh0,求此时的温度;此加热过程中,若气体吸收的热量为Q,求气体内能的变化。
下列关于古代文化知识的解说,不正确的一项是( )
A.“国子学”是中国封建时代的教育管理机关,也是中国古代教育体系中的最高学府,又称“国子监”或“国子寺”。
B.“至顺”是年号,“元年”是一个皇帝登上帝位的第一年。用年号纪年的方法始于西汉汉武帝时。
C.古时称遭遇父母之丧为“丁艰”“丁忧”,“丁内艰”指遭遇母亲去世,又称“丁内忧”。
D.元代在全国各地设立了多个行中书省,行中书省总揽各地政务,简称“行省”,直属中央政府管辖。
改错:(2019·江苏高考)Chris and Tim work at a zoo, helping endangering cranes with their reproduction.
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假设你是明启中学高三学生卢平,你的网友王磊近日就学习时如何记好笔记发邮件向你求教,请给他回复一封电子邮件,邮件必须包括以下内容:
1.描述两到三个不同的笔记类型及其特征;
2.如何记好笔记的建议。
(注意:中文请不要出现真实的校名人名)
你校英文报 Youth 正在庆祝创刊十周年。请你写一篇短文投稿,内容包
括:
1. 读报的经历;
2. 喜爱的栏目;
3. 期望和祝福。
注意: 1. 写作词数应为 80 左右; 2. 请按如下格式在答题卡的相应位置作答。
That holiday morning I didn't have to attend school. Usually,on holidays,Mother 41 me to sleep in.And I would certainly take full advantage of it.On this particular morning, 42 ,I felt like getting up early.
I stood by my window overlooking the 43 having nothing better to do.But as it turned out,I was soon to learn about something 44 in life.
As I watched several people go by,get into their cars and go off,I 45 an old man on a bicycle with a bucket on its 46 and a basket of rags and bottles on its back-carriage.He 47 from one car to another,washing and cleaning them.From the water on the ground,it seemed that he had already 48 washing and cleaning about a dozen or more cars.He must have begun to work quite early in the morning.
Several thoughts 49 my mind as I watched him work.He wasn’t well-dressed. He had on a pair of shorts and a(n) 50 T-shirt.The bicycle he rode was not by any means the kind modern 51 would want to be seen riding on.But he seemed 52 with life.There he was,working hard at his small business,53 at passers-by and stopping to chat now and then 54 elderly men and women on their way to the market nearby.
There was a noticeable touch of 55 in the way he seemed to be doing things 56 the windscreen(挡风玻璃),then standing back to admire it;scrubbing(擦净)the wheels and 57 , standing back to see what they look like after the scrub.
It was a 58 to learn,I felt.At no age need one have to beg for a 59 if one has good health and is willing to work hard.For a while I felt 60 of myself.Young as I am just sixteen,and there was this old man who must have been usefully engaged perhaps before the sun appeared above the horizon.
41.A.allows B.forces C.causes D.forbids
42.A.otherwise B.however C.therefore D.besides
43.A.bus stop B.parking lot C.school D.market
44.A.useful B.surprising C.awful D.interesting
45.A.called B.recognized C.noticed D.assisted
46.A.handle B.back C.wheel D.seat
47.A.searched B.1eft C.wandered D.moved
48.A.stopped B.finished C.intended D.started
49.A.disturbed B.slipped C.crossed D.inspired
50.A.simple B.shiny C.attractive D.expensive
51.A.repairmen B.cyclists C.drivers D.businessmen
52.A.content B.busy C.careful D.bored
53.A.1aughing B.1ooking C.waving D.pointing
54.A.about B.for C.1ike D.with
55.A.worry B.pride C.sympathy D.respect
56.A.fixing B.cleaning C.replacing D.covering
57.A.still B.again C.yet D.soon
58.A.1esson B.subject C.skill D.fact
59.A.business B.success C.1iving D.right
60.A.ashamed B.doubtful C.fearful D.tired