water_quality 关于二维水质计算的有限差分 的一个fortran程序，开边界处水流来就处的浓 0，而 Algorithm 数学
238万源代码下载-
&文件名称: water_quality
& & & & &&]
&&所属分类:
&&开发工具: Fortran
&&文件大小: 1 KB
&&上传时间:
&&下载次数: 18
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&详细说明：关于二维水质计算的有限差分方法的一个fortran程序，开边界处水流来就处的浓度为0，而水流流出边界采用纯对流公式计算。-Two-dimensional finite difference calculation method of water quality, a fortran program to open the border on the water at concentrations of 0, while the water outflow boundary pure convection equation.
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&[] - 求解2D的方腔流的fortran源代码有限差分法求解。
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&[] - 一维水质模型，c语言源程序，主要应用于河流水质的模拟
&[] - 一维水质模型，本程序研究一维河流的污染物扩散，短时间持续排放BOD的浓度变化规律
本程序采用中心隐式差分求解
问题t=0到t=1h偶然排放BOD 使河水断面L0=10mg/L河流平均速度5km/h
纵向弥散系数D=2km2/h
BOD衰减系数k1=0.015h-1 解BOD浓度 L(x，t
&[] - 一个基于交错网格系统的simpler程序，压缩包中包含了陶文铨老师对于程序的讲解，很清晰。
&[] - 使用fortran编写的一维环路流场和温度场计算程序，可计算可压缩流体和不可压缩流体。
&[] - 用C语言编写的有限差分法程序，采用隐式的交替方向法，求解温度场问题
&[] - 不同对流项离散格式对流场计算的影响Different discrete convection calculation of the flow field format一道关于数词的英语题_百度知道
一道关于数词的英语题
many millionB，说说应该选哪个好Drinking water safely cannot be taken for granted though-----Americans receive high quality drinking water every day from the public water system.many millions of我觉得两个都可以啊.A
提问者采纳
应该选B。millions可以用many修饰，但millions后面是不可以直接跟名词的，必须加of
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出门在外也不愁一道SAT语法题，求解。_百度知道
一道SAT语法题，求解。
s, strikes(E) like the sun&#39,求解释When light from a distant source, （s, such as rain, and striking(D) such as the sun, strikes答案是D我选的是E，谢谢, or fog, spray.(A) such as the sun, striking(C) such as the sun, a rainbow may appear, it strikes(B) like the sun&#39, it strikes） a collection of water drops
提问者采纳
这句子就有两个主语（it 和 a collection of water drops）然后考虑;s。所以含有it strikes的都不对。插入语在句子中即使删掉也不影响句子结构首先判断是插入语。我们可以说light from the sun.希望说清楚了.也就是说such as 后面的东西应该可以直接跟在 light from后面：such as指代的到底是什么,但不能说light from the sun&#39。是a distant source。因为如果这样的话
提问者评价
很清楚，谢谢。
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其他3条回答
注意前面是light from，那后面必须用地名只能是light from the sun,不可能是light from the sun's
such as the sun,做a distant source的同位语，由such as 引导因为有逗号，所以strikes前要有IT作主语，指代前边的light
句意是“当光线（就如阳光）从远处射来，当它照射到水珠（就像雨，浪花，或雾）时，彩虹就会形成”这里such as the sun是对前面的light的举例，就像后面such as rain, spray, or fog是对water drops的举例
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出门在外也不愁求解一道关于肾上腺素的生物题_百度知道
求解一道关于肾上腺素的生物题
有道大题是这么问的，为什么注射肾上腺素后人又心跳了，我也再想：为什么有些人在停止心跳和呼吸后及时注射肾上腺素可以让他脱离生命危险？这是选做题，呼吸和心跳都停止了？如果这样的话人一定会苏醒吗？还是植物人今天生物考试
提问者采纳
所以植物人没法苏醒。在人刚刚停止心跳和呼吸的时候。另外你也要知道，一旦过量，绝对不可以注入过量，首先你要知道，注入肾上腺素不能令细胞起死回生，还是活的，其中最为显著的是神经细胞和心脏，这个时候就可以利用肾上腺素，只是它不跳了，肾上腺素相当于强心剂。而植物人的大脑已经死亡，只是机体维持生命体征，。由于它能直接作用于冠状血管引起血管扩张，因此是一种作用快而强的强心药，改善心脏供血，心脏还没有缺氧，注入肾上腺素可以刺激全身细胞，心脏无法承受，就会骤停不是植物人
提问者评价
来自团队：
其他类似问题
向医生提问
完善患者资料：*性别：
为您推荐：
其他4条回答
错过了最佳时机这道题有两个字“及时”，全身不受控制地发抖，心脏觉得跳不动了一样，才救过来的，后来医生给我注射了两支肾上腺素，呼吸和心跳停止时间长了。至于一定会苏醒也说不上，抢救也是要看时间的，也是救不回来的。肾上腺素属于一种强心针。我曾经因为药物过敏而短暂休克，可以用于急救心肺复苏，气也喘不过来，当时自己还有意识但身体完全动不了了，那神医也救 不回来了。——来自“生命科学”团队的高中一线教师，也就是说
这应该是一位没有医学常识的纯生物学老师出的题。心跳、呼吸停止后可以做心内注射注入强心药，包括肾上腺素类药物，但同时，“必须”做人工心肺复苏术！在心腔内已经有药的前提下，通过按压心脏推动含药的血液进入心脏等器官发挥作用。肾上腺素的作用有扩张心脑血管以增强心肌收缩力和保证脑的血液供应等作用，收缩外周血管可以提升血压。
肾上腺素的一般作用是使心脏收缩力增强；心脏、肝、和筋骨的血管扩张和皮肤、粘膜的血管收缩。临床上一般采取的应急措施，主要用于抢救因药物过敏，心脏病、呼吸中止，休克等一些急症病人，给下一步抢救争取时间。如果抢救不及时，就会有生命危险甚至死亡。
呼吸心跳停止以后抢救是有时间前提的，大脑缺血缺氧4~6分钟就会发生不可逆的坏死。所以当然不是一定能苏醒。要是病人血压下降，休克等情况，肾上腺素是重要的急救药物，如果呼吸心跳已经停止，尤其是不在医院、没有条件时，进行心肺复苏尽快恢复心跳、呼吸，保障脑供血就是最重要的。
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出门在外也不愁答案：1．D;2．A;3．C;解析：(1)
这是一道细节题。根据短文第二段的“Safe drinking water is a precondition for health and the fight against child death rate”一句可判断出安全饮水是最基本的需要。
这是一道推断题。根据短文中多次提到U．S．可判断出这篇短文的读者可能是美国人，因为只有美国的选民才能给美国的国会议员写信呼吁改善国外的饮用水问题。
这是一道主旨题。这篇短文讲述了全球缺乏饮用水的问题，号召人们与之作斗争。
请选择年级高一高二高三请输入相应的习题集名称(选填)：
科目：高中英语
来源：福建省福州三中2012届高三校模拟英语试题
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
　　The decision of the New York philharmonic to hire Alan Gilbert as its next music director has been the talk of the classical-music world ever since the sudden announcement of his appointment．For the most part, the response has been favorable, to say the least “Hooray! At last!” wrote Anthony Tommasini, a classical-music critic．
　　One of the reason why the appointment came as such a surprise, however, is that Gilbert is comparatively little known．Even Tommasini, who had advocated Gilbert's appointment in the Times, calls him “an musician with no air of the formidable(令人敬畏的)conductor about him．” As a description of the next music director of an orchestra that has so far been led by musicians like Gustav Mahler and Pierre Boulez, that seems likely to have struck at least some Times readers as faint praise．
　　For my part, I have no idea whether Gilbert is a great conductor or even a good one．To be sure, he performs an impressive variety of interesting compositions, but it is not necessary for me to visit Avery Fisher Hall, or anywhere else, to hear interesting orchestral music．All I have to do is to go to my CD shelf, or open my computer and download still more recorded music from iTunes．
　　Devoted concertgoers who reply that recording are no substitute for live performance are missing the point．For the time, attention, and money of the art-loving public, classical instrumentalists(演奏家) must compete not only with opera houses, dance groups , theater companies, and museums, but also with the recorded performances of the great classical musicians of the 20 th century．Their recordings are cheap, available everywhere, and very often much higher in artistic quality than today's choosing．The widespread availability of such recording has thus brought about a crisis in the institution of the traditional classical concert．
　　One possible response is for classical performers to program attractive new music that is not yet available on records．Gilbert's own interest in new music has been widely noted：Alex Ross , a classical-music critic, has described him as a man who is capable of turning the Philharmonic into “a markedly different, more energetic organization”．But what will be the nature of that difference? Merely, expanding the orchestra's repertoire(曲目)will not be enough．If Gilbert and the Philharmonic are to succeed, they must first change the relationship between America's oldest orchestra and the new audience it hopes to attract．
We learn from Para 1 that Gilbert's appointment has ________．
met with criticism
received applause
raised suspicion
aroused curiosity
The author believes that the devoted concertgoers ________．
reject most kinds of recorded performance
fail to recognize the variety of live performance
overestimate(高估)the variety of live performance
ignore the expense of live performance
According to the text, which of the following is true of recordings?
They are often inferior to live concerts in quality
They are easily accessible to the general public
They help improve the quality of music
They have only covered masterpieces
Regarding Gilbert's role in revitalizing( 振兴) the Philharmonic, the author feels ________
enthusiastic
科目：高中英语
来源：浙江省舟山市2010届高三高考模拟试题（英语）
题型：阅读理解
第二部分：阅读理解（第一节20小题，第二节5小题；每小题2分，满分50分）
第一节：阅读下列短文, 从每题所给的四个选项 (A、B、C和D)
中, 选出最佳选项。
Being interested in a
theme park since the time that I was a child, I have learned a thing or two
over the years about packing for a day of fun. A trip to a theme park is always
a adventure, but if you’re not prepared, your day of fun could easily turn into
a tiny little nightmare(噩梦). It is important to pack long sleeved(带袖的) shirts or jackets for all members of your family. I is also a good
idea to pack an extra pair of socks for each member of the family, especially
the children, as those wonderful water rides can be fun, but wet socks that
won’t dry aren’t so much fun.
You don’t want to pack
too much food, as you will probably want to experience at least some of the
food offered at the theme park of your choice(that’s half of the fun), but it’s
always a good idea to bring some energy increasing snacks, such as fruit,trail
mix,etc. This can mean the difference between spending a lot of money on snacks
or a little money on one or two good meals.
Theme parks,while fun
and exciting, can wear a person out,especially a child, so it’s important to
keep hydrated(含水的). I would suggest packing one bottle of water
per person, and possibly a couple of cans of soda or bottles of juice as well.
It’s a good idea to
have at least two cell phones or even a set of “walkie-talkies” in the event
that your family gets,separated in the park. It’s a good idea to give one of
these things to the children and one to the parents and make sure that each of
them knows how to use it. This could be the difference between trouble and a
happy ending,
1.You should get well
prepared before going to a theme park__________.
& A. because the
trip always costs much money
B.because there are always too many people in a theme park.
C. so as not to suffer from bad dreams when going back
D.so as to cut down your trip expenses and have more fun
2.From the passage, we
can know_______________.
& A.the author was
fond of visiting theme parks when he was a child
B.wearing wet socks in a theme park will bring children
much fun
C.it is terrible to have a taste of the food offered in a theme
park.
D. we’d better bring enough food, clothing and water when
going to a theme park
3.What does th
underlined part”walkie-talkies” in the last paragraph probably refer to?
& A. A kind of
transportation tool&&&&&&&&&&
B.A kind of musical instrument
C.A kind of
CDplayer&&&&&&&&&&&&&&&&&
D.A kind of phone
4.How many types of
things does the author advise us to pack for day trips to a theme park?
& A
Three&&&&&&&&
B.Five&&&&& C.Six&&&&& D.
Eight
科目：高中英语
题型：阅读理解
第二部分：阅读理解（第一节20小题，第二节5小题；每小题2分，满分50分）
第一节：阅读下列短文, 从每题所给的四个选项 (A、B、C和D) 中, 选出最佳选项。
Being interested in a theme park since the time that I was a child, I have learned a thing or two over the years about packing for a day of fun. A trip to a theme park is always a adventure, but if you’re not prepared, your day of fun could easily turn into a tiny little nightmare(噩梦). It is important to pack long sleeved(带袖的) shirts or jackets for all members of your family. I is also a good idea to pack an extra pair of socks for each member of the family, especially the children, as those wonderful water rides can be fun, but wet socks that won’t dry aren’t so much fun.
You don’t want to pack too much food, as you will probably want to experience at least some of the food offered at the theme park of your choice(that’s half of the fun), but it’s always a good idea to bring some energy increasing snacks, such as fruit,trail mix,etc. This can mean the difference between spending a lot of money on snacks or a little money on one or two good meals.
Theme parks,while fun and exciting, can wear a person out,especially a child, so it’s important to keep hydrated(含水的). I would suggest packing one bottle of water per person, and possibly a couple of cans of soda or bottles of juice as well.
It’s a good idea to have at least two cell phones or even a set of “walkie-talkies” in the event that your family gets,separated in the park. It’s a good idea to give one of these things to the children and one to the parents and make sure that each of them knows how to use it. This could be the difference between trouble and a happy ending,
1.You should get well prepared before going to a theme park__________.
& A. because the trip always costs much money
B.because there are always too many people in a theme park.
C. so as not to suffer from bad dreams when going back
D.so as to cut down your trip expenses and have more fun
2.From the passage, we can know_______________.
& A.the author was fond of visiting theme parks when he was a child
B.wearing wet socks in a theme park will bring children much fun
C.it is terrible to have a taste of the food offered in a theme park.
D. we’d better bring enough food, clothing and water when going to a theme park
3.What does th underlined part”walkie-talkies” in the last paragraph probably refer to?
& A. A kind of transportation tool&&&&&&&&&& B.A kind of musical instrument
C.A kind of CDplayer&&&&&&&&&&&&&&&&& D.A kind of phone
4.How many types of things does the author advise us to pack for day trips to a theme park?
& A Three&&&&&&&& B.Five&&&&& C.Six&&&&& D. Eight
科目：高中英语
来源：安徽省期中题
题型：阅读理解
阅读理解.&&&& The World Trade Center was built from 1969 to 1973 at a cost of ＄750 million. The two 110-story towers had been the tallest buildings until the Sears Tower in Chicago was completed in 1974 at 1450.&&&& The World Trade Center was hit by two planes and it fell in a short time later on September 11 th, 2001.&&&& America and United airlines both said two of their planes had been hijacked(劫持)and crashed.&&&& America said its planes were carrying a total of 156 people. One was a Boston-Los Angeles. An FBI man said the former, a Boeing 767, hit one of the Trade C the later, a Boeing 757, hit the pentagon(五角大楼).&&&& Two United airliners with a total of 110 aboard also crashed -a Boeing 757 outside Pittsburgh, the other, a Boeing 767, into the Trade Center.&&&& The crash in Pennsylvania was a New York-San Francisco fight. It rushed into the ground in a field about 85 miles from Pittsburgh. US officials said it was possible the plane had been on a course for the presidential house at Camp David.&&&& The police received a phone call at 9:58 am. It came from a man who said he was apassenger locked in the bathroom of United Flight 93.&&&& " We are being hijacked. We are being hijacked! It is going down quickly. I can see some white smoke coming from the front and hear some terrible noise. What's happening?My God!"1 .Which statement is true according to the passage?______A. The World Trade Center has been the highest building since 1973.B. The World Trade Center was hit by three planes.C. The Sears Tower in Chicago is taller than the World Trade Center.D. The World Trade Center was 1450 feet high.2.&What kind of planes hit the World Trade Center?_____A. A Boeing 757 and a Boeing 767. B. Two planes of Boeing 757.C. Two planes of Boeing 767.D. Tow planes from New York.3. From the passage we can know another hitting target which the hijackers wanted but failed to hit is ________.A. San Franciso B. the Pentagon C. PittsburghD. Camp David4. What can we infer from the phone call?______A. The man was in the bathroom. B. The plane was in great danger.C. A fire broke out the plane D. The man who made the phone call was a pilot.
科目：高中英语
来源：0113
题型：阅读理解
阅读理解。&&&& Sometimes teens need to have some time away from their families. They may want to move out of the family home for a while. Many parents will say no to this demand. But experts say it might be a good idea to let your teens live with a friend or relative. &&&& "It was the break I need at the time," said Richant Lerner. He is talking about the time he spent living with grandmother when he was 15. &&&& "It allowed me to be a different person than I was with my parents," Lerner said. He now heads the Institute (学会)for Children, Youth and Families at Michigan State University. Experts say teens living away from their families can test new ways of thinking and getting along with people. They may see new solutions to problems. &&&& This is different from running away, the experts stress (强调). Runaways are often feeing serious problems. &&&& Some teens who want some time away from family attend a structured summer program. Others live for a while with a relative or with the family of a friend. If there is a conflict (冲突) at home, having a teen live elsewhere can benefit other family members. It gives everyone space to develop better relationships. &&&& Joseph Kett teaches history at the University of Virginia in Charlottesville. He says living at home until the late years has become the norm (准则) only in recent times. "In the 17 th century, children were often sent to live in other people's homes when they were about 10 or 11," he said. 1. When children seriously disagree with their parents, experts suggest that parents should____. A. punish them B. let them live for a while away from their families C. send for a doctor D. keep them in the house 2. The underlined word "structured" means"______". A. built B. played C. organized D. drunk 3. In the 17th century,_______. A. teens never left their families B. teens never made friends with each other C. teens never went to school D. teens often left their parents 4. Nowadays living away and running away from home_______.A. never happen B. often worry parents and teachers C. are very popular D. are accepted by people