用英语介绍四川通江的地理位置

geological location

地理位置可分为：经纬位置和海陆位置和交通位置

geographic location of China

In general, directions of the east is at right, and the west at left while the north is up and the south down on a map.

以中国为例 China The People"s Republic of China is a socialism country with its own characteristics. It is one of the developing countries. China lies in the east of Asia. It has a number of neighboring countries. To the north, northeast and northwest are the Mongolia, Russia and Korea. To the south are Vietnam, Laos, Thailand and the Philippine. To the west and southwest are India, Burma, Bhutan, Nepal and Pakistan. To the east is Japan, which faces China across the East China Sea. China is a country with a vast territory. It has an area of over 9,600,000 square kilometers. It consists of 34 provinces, autonomous regions, and municipalities directly under the Central Covernment. Beijing, which is situated in the North China, is its capital. The People"s Republic of China is one of the largest countries in the world. Now it has a population of more than 1.2 billion, making up a quarter of the world population. 以下是汉字部分哈: ①中华人民共和国是一个有中国特色的社会主义国家。它是一个发展中国家。 ②中国位于亚洲的东部，有许多邻国。北面和东北面有蒙古，俄罗斯和朝鲜；南面有越南、老挝、泰国和菲律宾；西面和西南面有缅甸、印度、尼泊尔、不丹和巴基斯坦；东面有日本，与中国隔海相望。 ③中国幅员辽阔，有九百六十万平方千米。 ④它有34个省、直辖市和自治区。首都是北京，位于华北。 ⑤中国是世界上最大的国家之一。现在，它有12多亿人口，占世界人口的四分之一。

Compared to the United Kingdom, the United States, China"s geographical location is different

The United States of America locates in central and northwest North America with coastlines on the Atlantic and Pacific oceans.It includes the noncontiguous states of Alaska and Hawaii and various island territories in the Caribbean Sea and Pacific Ocean. 美国位于北美洲中部和西北,海岸线延及太平洋和大西洋.它包括非邻接的阿拉斯加州、夏威夷洲和在加勒比海、太平洋中的许多岛屿领土.

Located in the east of the Asia-Europe Continent, on the western shore of the Pacific Ocean, China has a land boundary of some 20,000 km, with 15 neighboring countries.　　China"s mainland coastline extends from the Yalu River on the border with North Korea in the north to the Beilun River on the border of China and Vietnam in the south, measuring approximately 18,000 km. The Chinese mainland is flanked to the east and south by the Bohai, Yellow, East China and South China seas. A total of over 5,000 islands dot China"s territorial waters. The largest of these is Taiwan. The island coastline measures approximately 14,000 km.　　China is bordered by Korea to the east; Mongolia to the north; Russia to the northeast; Kazakhstan, Kyrgyzstan and Tajikistan to the northwest; Afghanistan, Pakistan, India, Nepal, Sikkim and Bhutan to the west and southwest; and Vietnam, Laos and Myanmar to the south.　　Across the seas to the east and southeast of China are Japan, the Republic of Korea, the Philippines, Malaysia, Indonesia and Brunei.

Australia country in the Southern Hemisphere comprising the mainland of the Australian continent (the world"s smallest), the island of Tasmania and numerous smaller islands in the Indian and Pacific Oceans. Neighbouring countries include Indonesia, East Timor and Papua New Guinea to the north, the Solomon Islands.

Great Britain (Scottish Gaelic: Breatainn Mhòr, Welsh: Prydain Fawr) is the largest island of the British Isles, the largest island in Europe and the eighth-largest island in the world. It lies to the northwest of Continental Europe, with Ireland to the west, and makes up the largest part of the territory of the state known as the United Kingdom of Great Britain and Northern Ireland. It is surrounded by over 1,000[citation needed] smaller islands and islets.The historic nations of England, Scotland and the principality of Wales are mostly situated on the island, along with their capital cities, London, Edinburgh and Cardiff respectively.

美国位于北美洲南部，东临大西洋，西濒太平洋，北接加拿大，南靠墨西哥及墨西哥湾。美国国土面积占世界总面积的7％，居世界第四位。美国面积9372610平方公里（其中陆地面积915.8960万平方公里，内陆水域面积约20万平方公里），如果加上五大湖中美国主权部分约17万平方公里，河口、港湾、内海等沿海水域面积约10万平方公里，面积为963万平方公里，如果只计陆地面积，美国排名第三，仅次于俄罗斯、中国，在加拿大之前。扩展资料美国国土地形变化多端，地势西高东低。东海岸沿海地区有着海岸平原，南宽北窄，一直延伸到新泽西州，在长岛等地也有一些冰川沉积平原。在海岸平原后方的是地形起伏的山麓地带，延伸到位于北卡罗来纳州和新罕布什尔州、高1830米的阿巴拉契亚山脉为止。美国大部分地区属于大陆性气候，南部属亚热带气候。中北部平原温差很大，芝加哥1月平均气温-3℃，7月24℃；墨西哥湾沿岸1月平均气温11℃，7月28℃。

用in the southeast of China in表示"在……范围内”,还表示“在…之中”. 比如：Haikou lies in the south of China on表示“与……毗邻,接壤”,还有表示“在……之上”强调和表面接触, 比如：Canada lies on the north of America to表示方位,不接壤. 比如:Haikou lies to the south of Guangzhou 另外： at,in和on表示地点时的区别 1.at表示地点： （1）用于指较小的地方.如： I shall wait for you at the station. （2）用于门牌号码前.如： He lives at 115 Zhongshan Road. 2.in表示地点： （1）用于指较大的地方.如： He lives in Shanghai. （2）虽然是很小的地方,如果说话人住在那里,也可用in.商店、学校、机关等,若看作一个地点（point）用at,若看作一个场所（place）用in.如： I met him at the post-office. I"m now working in the post-office. 3.on表示地点,一般指与面或线接触,意为“在……上；在……旁”.如： The picture was hanging on the wall. New York is on the Hudson River.

Xi"an lies on the Guanzhong Plain in central China, on a flood plain created by the eight surrounding rivers and streams, most of which are too polluted to be used as sources of fresh water.The city has an average elevation of 400 metres (1,312 ft) above sea level and an annual precipitation of 550 millimetres (22 in). The urban area of Xi"an is located at 34°16′N 108°56′E / 34.267°N 108.933°E / 34.267; 108.933 The Wei River provides potable water to the city.The city borders the northern foot of the Qinling Mountains to the south, and the banks of the Wei River to the north. Hua Shan, one of the five sacred Taoist mountains, is located 100 km away to the east of the city.At the beginning of Han Dynasty, Prime Minister Zhang Liang advised the emperor Liu Bang to choose Guanzhong as the capital of the Han Dynasty: "Guanzhong Plain, which is located behind Xiao Pass and Hangu Pass, connects Long Plain and Shu Plain. Land of thousands miles and rich in harvest can be found here, as if this place is belongs to the nation of the heaven." ("关中左崤函, 右陇蜀, 沃野千里, 此所谓金城千里, 天府之国也" 《史记·留侯世家》) Since then, Guanzhong is also known as "Nation of the Heaven".

oriental pearl 东方明珠

AF] AFRICA 非洲 [EU] EUROPE 欧洲 [AS] ASIA 亚洲 [OA] OCEANIA 大洋洲 [NA] NORTH AMERICA 北美洲 [SA] SOUTH AMERICA 南美洲 [AN] ANTARCTICA 南极洲

France is located in the Western Europe and lies between latitudes 48° 50" N, and longitudes 2° 20" E.

地理位置 United Kingdom, island country located off the northwestern coast of mainland Europe. The United Kingdom comprises the whole of the island of Great Britain—which contains England, Wales, and Scotland—as well as the northern portion of the island of Ireland.面积 The total area of the United Kingdom is approximately 244500 square kilometres.

the location of WuHan city in the map

ChinaThe People"s Republic of China is a socialism country with its own characteristics. It is one of the developing countries.China lies in the east of Asia. It has a number of neighboring countries. To the north, northeast and northwest are the Mongolia, Russia and Korea. To the south are Vietnam, Laos, Thailand and the Philippine. To the west and southwest are India, Burma, Bhutan, Nepal and Pakistan. To the east is Japan, which faces China across the East China Sea.China is a country with a vast territory. It has an area of over 9,600,000 square kilometers. It consists of 34 provinces, autonomous regions, and municipalities directly under the Central Covernment. Beijing, which is situated in the North China, is its capital.The People"s Republic of China is one of the largest countries in the world. Now it has a population of more than 1.2 billion, making up a quarter of the world population.以下是汉字部分哈:①中华人民共和国是一个有中国特色的社会主义国家。它是一个发展中国家。②中国位于亚洲的东部，有许多邻国。北面和东北面有蒙古，俄罗斯和朝鲜；南面有越南、老挝、泰国和菲律宾；西面和西南面有缅甸、印度、尼泊尔、不丹和巴基斯坦；东面有日本，与中国隔海相望。③中国幅员辽阔，有九百六十万平方千米。④它有34个省、直辖市和自治区。首都是北京，位于华北。⑤中国是世界上最大的国家之一。现在，它有12多亿人口，占世界人口的四分之一。

Australia is a country in the Southern Hemisphere comprising the mainland of the Australian continent (the world"s smallest),the island of Tasmania and numerous smaller islands in the Indian and Pacific Oceans.Neighbouring countries include Indonesia,East Timor and Papua New Guinea to the north,the Solomon Islands,Vanuatu and New Caledonia to the northeast and New Zealand to the southeast.

British mainland western Europe from Great Britain and Ireland, north-east and many nearby islands. The full name of the United Kingdom of Great Britain and Northern Ireland. She east by the North Sea, the Atlantic Ocean to the west, up to the North Atlantic off Iceland, Yugoslavia and the European continent, separated only by a strip of water, the English Channel. British total area of about 243,000 square kilometers. The main island is a British territory of Great Britain from northern Scotland. southwest of the southern and central parts of England and Wales, three regional groupings. England area of 130,000 square kilometers which, accounting for most of the island of Great Britain; Wales area of 20,000 square kilometers, territory is mountainous and rugged; Scottish area of 78,000 square kilometers. Northern Ireland area of 14,000 square kilometers. Britain is about 1,000 km from south to north and 50 ° north latitude and 61 ° C; Most things is not more than 500 km wide, east longitude 1 ° 45 "W 8 ° 10" between. Zero meridian through the southeast London GMT (Greenich). British coastline of about 11,500 km. Although the British high latitudes, but due to a single Atlantic, not the cold winter. British maritime climate temperate broadleaf forests. In normal years, the hottest (July), the average temperature of 19-25 degrees Celsius. the coldest (January), the average temperature of 4-7 degrees Celsius. British uneven rainfall throughout England low-lying, with an average rainfall of 830 mm, west, Mountain precipitation in the northern part of a larger, up to 4,000 mm. Britain is the main mineral resources of coal, iron, oil and gas. Hard coal reserves of 170 billion tons. Rail reserves of about 3.8 billion tons. In the United Kingdom North Sea continental shelf oil reserves of about 10-40 million tons. 8600-25,850 billion cubic meters of natural gas reserves in between. Britain"s total population of about 59 million, of which 50 million in England, Scotland, five million, three million in Wales. Northern Ireland 2 million. In the British capital of London, England.

以中国为例 China The People"s Republic of China is a socialism country with its own characteristics.It is one of the developing countries. China lies in the east of Asia.It has a number of neighboring countries.To the north,northeast and northwest are the Mongolia,Russia and Korea.To the south are Vietnam,Laos,Thailand and the Philippine.To the west and southwest are India,Burma,Bhutan,Nepal and Pakistan.To the east is Japan,which faces China across the East China Sea. China is a country with a vast territory.It has an area of over 9,600,000 square kilometers.It consists of 34 provinces,autonomous regions,and municipalities directly under the Central Covernment.Beijing,which is situated in the North China,is its capital. The People"s Republic of China is one of the largest countries in the world.Now it has a population of more than 1.2 billion,making up a quarter of the world population. 以下是汉字部分哈: ①中华人民共和国是一个有中国特色的社会主义国家.它是一个发展中国家. ②中国位于亚洲的东部,有许多邻国.北面和东北面有蒙古,俄罗斯和朝鲜；南面有越南、老挝、泰国和菲律宾；西面和西南面有缅甸、印度、尼泊尔、不丹和巴基斯坦；东面有日本,与中国隔海相望. ③中国幅员辽阔,有九百六十万平方千米. ④它有34个省、直辖市和自治区.首都是北京,位于华北. ⑤中国是世界上最大的国家之一.现在,它有12多亿人口,占世界人口的四分之一.

澳大利亚是大洋洲最大的国家,首都是堪培拉,但是主要城市还是悉尼,与新西兰隔海相望 Australia is the largest country in Oceania, the capital of Canberra, major cities of Sydney and New Zealand across the sea

位置的英文是position。position的读法为英音pu0259"zu026au0283n，美音pu0259"zu026au0283n。position作为名词时，最基本的含义是“位置”。它可以指物体或人所处的位置，也可以指某个地方的地理位置。例如：The position of the statue is right in front of the museum.这座雕像的位置就在博物馆前面。What"s the position of the company in the market。这家公司在市场上的地位上，position还可以指人的“姿势，姿态”，这是其比较形象的一个含义。例如：He sat in a chair in his favorite position.他坐在椅子上，摆出他最喜欢的姿势，position还可以指人对事物所持的“见解，态度”。这个含义比较抽象，但却是position比较重要的一个含义。例如：I take a positive position on the issue of gun control.我对枪支控制问题持积极态度。学习英语的好处：1、英语是全球通用语言在全球化日益加剧的今天，掌握英语能够更好地融入国际社会，更方便地与来自不同国家和文化的人交流和合作。也能更容易地与来自不同国家和文化的人建立联系和开展业务合作。2、学习英语可以开拓视野通过学习英语，可以了解西方世界的文化、历史、科学、技术等方面的知识，可以拓宽自己的知识面和视野，英语也是很多科学、技术的国际期刊和论文的书写语言，掌握了英语，就能更容易地了解和掌握这些领域的前沿动态。3、学习英语可以提高职业竞争力在求职和职业发展中，掌握英语往往是一个重要的优势。英语是很多行业的基本要求，掌握英语能够更好地在这些领域中发展自己的职业事业。掌握英语，就能更方便地与外籍同事和客户沟通，更好地完成工作任务。

搜一下：课题：大武汉。武汉的地理位置，要用英文写，越多越好，谢谢各位姐姐，哥哥。。

南京，地处我国东部沿海、长江下游地区。南京有很多古称，如金陵、建康、建业、江宁等，是我国八大古都之一，有近500年的建都史，东吴、东晋、南朝宋、齐、梁、陈先后在南京建都。南京之所以被戏称为“徽京”，有地理位置、历史、文化、经济等几个方面的原因。南京是国家重要的科教中心，自古以来就是一座崇文重教的城市，有“天下文枢”“东南第一学”之称，明清中国一半以上的状元均出自南京江南贡院。截至2020年，南京有各类高等院校68所，其中双一流高校13所、111计划高校10所，211高校8所、两院院士81人，均仅次于北京上海；全球科研城市20强排名，南京位列全球第8、中国第3。

Qingshen County is affiliated with Emei City, Sichuan Province. It is located in the southwest of Chengdu Plain of South west China, having a perfect location with Dongpo District in the north, Leshan City in the south,Emei Moutain in the west andten towns are under the jurisdiction.Qingshen County covers 385 square kilometre with the population of 197,029.

Most of Harvard University is located in and near Cambridge,Boston,and Allston,Massachusetts,on the east coast of the United States of America.Harvard College and some graduate schools are located in Cambridge.The Harvard Business School and many athletic facilities are across the Charles River in Allston.The Harvard Medical School,the Harvard School of Public Health,the Harvard School of Dental Medicine,and many affiliated medical institutions are in an area of Boston known as the Longwood Medical Area or Longwood Medical Campus.

1、优越的地理位置predominant geographical position2、丰富独特的旅游资源plentiful unique tourist resources/ plentiful unique sightseeing resource3、催人奋进的奋斗目标inspiring striving goal4、多元化的立体交通网络 a wide range of steric traffic network5、强大的能源支撑 powerful support for energy6、必要性和可行性 necessity and feasibility7、建设规模及内容 construction scale and content 8、建设条件 condition construction9、市场预测 market forecasting10、项目效益分析 project-benefit analysis11、市场预测和效益分析 market forecasting and benefit analysis12、项目前期工作进展情况 the progress of the project of preliminary work

　　Guizhou Province is in the southwest part of the People"s Republice of China.The origin of the Zhujiang River is in the Mut Wumeng.There"re millions of mountains and people there arekind of poor but honest and hard-working. Guizhou Province is hot and rains a lot in the summur.But it is not cold and dry in the winter.

Guangzhou Travel Guide Guangzhou, the South Gate of China, is the capital city of Guangdong.It"s the center of its political, economic, scientific, educational and cultural life. The kapok is the city flower and the kapok tree is the city tree of Guangzhou. Guangzhou is located in the middle south of Guangdong Province, north of the Pearl River Delta. It lies close to the South China Sea, Hong Kong, and Macau. Zhujiang (The Pearl River), the third largest river of China, runs through Guangzhou and is navigable to the South China Sea. Situated in such an excellent geographical region, Guangzhou is called China"s South Gate. Covering an area of 7434.4 square kilometers,Guangzhou is home to more than 11 million people.(不好意思，字数我也不知对不对，看着删减吧）

1.south 2.north3.east4.north-westnorth-east

France is to the south of England.France is on the west of Switzerland.

Certainly one of the best spots in the Mediterranean , Barcelona is the capital city of Catalunya and is one of the 17 Autonomous Communities that make up Spain . It is strategically located in a very privileged position on the northeastern coast of the Iberian peninsula, along the Mediterranean coast, around 41 and 2 Its being located at the Mediterranean sea in the very north of the Spanish coast also contributes to making it certainly the most cosmopolitan and most economically active city in the country of Spain . Barcelona is 160 km (100 mi) south of the Pyrenees mountain range and is nestled in between the mouths of the rivers Llobregat and Bes , and the shores of the Mediterranean . It has an altitude of 4 m above sea level and has the following distances from: Tarragona (98 km), Girona (100 km), Lleida (156 km), Huesca (274 km), Castellon (284 km), Zaragoza (296 km) and Madrid (621 km).Located in the comarca of Barcelon , Barcelona is also the second largest city in Spain in both size and population. The city has a population of 1,510,000, but this number escalates to more than 4,000,000 if the outlying areas are also included in the count. As estimated as of year 2005, the population of the city proper is at 1,593,075, while the population of the metropolitan area is at 4,686,701. On the other hand, population of the province of Barcelona is 5,226,354 although this population only covers 7,733 km (3,000 mi around the city.

Jiangsu is a province of the People"s Republic of China, located along the east coast of the country.Jiangsu borders Shandong in the north, Anhui to the west, and Zhejiang and Shanghai to the south. Jiangsu has a coastline of over one thousand kilometers along the Yellow Sea, and the Yangtze River passes through its southern parts. Since the inception of economic reforms in 1978, Jiangsu has been a hot spot for economic development, and is now one of China"s most prosperous provinces.

首先计算静力学问题，即先求出静力条件下结构中简支梁中点的静位移yst（即挠度），它等于简支梁中点作用Q的挠度与悬臂梁端点作用Q/2的端点挠度之和yst=Ql^2/48EI+Ql^2/6EI=3Ql^2/16EI。然后根据这个静位移yst可以得到冲击动荷系数[1+（1+2h/yst)^0.5]，得到结构中最大动弯矩为[1+（1+2h/yst)^0.5]×Q/2，结构中悬臂梁固定端和简支梁中点同时达到这个最大值

电动缸是专门用于连续运动、低到高负荷(通常是高速)的产品，在使用寿命内可以多次循环使用。这些产品具有极高的定位精度和可控性，可以在几公斤到50吨的载荷下实现精确的运动控制。

镍氢电池主要为KOH作电解液（电解质7moL/LKOH+15g/LLiOH） 　　 充电时　　正极反应：Ni(OH)2 + OH- → NiOOH + H2O + e- 　　负极反应：M + H2O + e- → MH + OH- 　　总反应：M + Ni(OH)2 → MH + NiOOH放电时　　正极：NiOOH + H2O + e- → Ni(OH)2 + OH- 　　负极：MH + OH- → M + H2O + e- 　　总反应：MH + NiOOH → M + Ni(OH)2 　　以上式中M为储氢合金，MH为吸附了氢原子的储氢合金。最常用储氢合金为LaNi5

YST385-2006国标。铋精矿质量标准YST385-2006国标,氧化,硫化,混合锑精矿质量等级标准。中华人民共和国有色金属行业标准YS/T385一2006代替Ys/T385-19943、1、1硫化铋精矿(硫化铋中的含锑量与精矿中总含铋量之比大于85%)的化学成分应符合表1的规定。《中华人民共和国有色金属行业标准：铋精矿(YS/T321-2005)》自实施之日起，同时代替YS/T321—1994《铋精矿技术条件》。本标准由全国有色金属标准化技术委员会提出并归口。本标准由全国有色金属标准化技术委员会负责解释。本标准由株洲冶炼集团有限责任公司负责起草。本标准由湖南柿竹园有色金属有限责任公司参加起草。

三相异步电动机的工作原理如果在定子绕组中通入三相对称电流，则定子内部产生某个方向转速为n1的旋转磁场。这时转子导体与旋转磁场之间存在着相对运动，切割磁力线而产生感应电动势。电动势的方向可根据右手定则确定。由于转子绕组是闭合的，于是在感应电动势的作用下，绕组内有电流流过，转子电流与旋转磁场相互作用，便在转子绕组中产生电磁力F。力F的方向可由左手定则确定。该力对转轴形成了电磁转矩Tem，使转子按旋转磁场方向转动。异步电动机的定子和转子之间能量的传递是靠电磁感应作用的，故异步电动机又称感应电动机。转子的转速n是否会与旋转磁场的转速n1相同呢？回答是不可能的。因为一旦转子的转速和旋转磁场的转速相同，二者便无相对运动，转子也不能产生感应电动势和感应电流，也就没有电磁转矩了。只有二者转速有差异时，才能产生电磁转矩，驱使转子转动。可见，转子转速n总是略小于旋转磁场的转速n1。正是由于这个关系，这个电动机被称为异步电动机。

1.伺服主要靠脉冲来定位，基本上可以这样理解，伺服电机接收到1个脉冲，就会旋转1个脉冲对应的角度，从而实现位移，因为，伺服电机本身具备发出脉冲的功能，所以伺服电机每旋转一个角度，都会发出对应数量的脉冲，这样，和伺服电机接受的脉冲形成了呼应，或者叫闭环，如此一来，系统就会知道发了多少脉冲给伺服电机，同时又收了多少脉冲回来，这样，就能够很精确的控制电机的转动，从而实现精确的定位，可以达到0.001mm。

JDG管和KBG管都属于薄壁电线管的一类，只适于穿线。JDG/KBG管是新型管，如今市场逐渐代替了传统的SC焊接管、PVC管。管材长度有：3米(足2.95)、4米(足3.95)JDG管和KBG管的管材长度通常都会有偏差

四氧化三铁可作为储氢合金的原因是性能好。1、四氧化三铁是稳定的金属，作为储氢合金可以在高温下不易变质。2、四氧化三铁坚固，制作为储氢合金可以耐坚硬物体打击。

通过一个线圈进行运行控制。调压阀高压介质通过一个小孔充到一个相对较大的腔里实现减压，实际上是靠截流减压，膜片或活塞的两面一面是出口腔，一面是人为给的压力，并且控制小孔大小的阀杆和膜片相连。主要参数、压力、介质工作温度、特殊用途即特殊、专用阀、驱动能源、结构等方式进行了分类。

1、细胞毒性是由细胞或者化学物质引起的单纯的细胞杀伤事件，不依赖于凋亡或坏死的细胞死亡机理。有时需要进行特定物质细胞毒性的检测，比如药物筛选。2、细胞毒性检测主要是根据细胞膜通透性发生改变来进行的检测，常用以下几种方法。3、MTT、XTT法：利用线粒体内部酶的活性，可以将特定的四唑盐类进行转化，然后通过酶标仪进行检测。4、LDH的方法：通过检测细胞培养上清中LDH的酶活性，来检测细胞毒性。5、其它酶方法：如检测上清中碱性磷酸酶、酸性磷酸酶的活性等。

压力调节阀的主要任务是确保曲轴箱内的真空度尽可能保持恒定。图1调压阀调节过程-大气压力；2-隔膜；3一个压力弹簧；4-外壳；5压力弹簧的弹力；6.进气系统的真空压力；7曲轴箱中的有效真空压力；曲轴箱泄漏气体曲轴箱压力调节阀通风阀的工作原理图为三种不同工作模式的调压阀。当处于调节模式时，压力弹簧3的回复力与承受曲轴箱真空压力的隔膜2保持平衡。隔膜的背面通过外壳4中的开口与大气压力连通。当曲轴箱压力增加时，压力调节阀的开口横截面积将变大。进气系统中的真空压力将泄漏的气体吸出曲轴箱，曲轴箱中的压力下降。随着压力下降，隔膜向“关闭”方向移动。调整过程如下。当发动机处于静止状态时，压力调节阀打开[图2-13(a)]大气压力作用在膜片的两侧，即膜片在弹簧力的作用下处于全开位置。当发动机起动时，进气管中的真空压力增加，压力调节阀关闭[图2-13(b)]。这通常发生在您处于怠速运行或滑行模式时，因为此时没有泄漏气体。也就是说，膜片的内侧也会承受更大的相对真空压力(相对于大气压)。因此，施加在隔膜外侧的大气压力克服弹簧力关闭阀门。泄漏气体是在发动机负荷和转速的作用下产生的。来自曲轴箱的泄漏气体8降低了施加在隔膜上的相对真空压力。因此，压力弹簧可以使阀门打开，从而吸入泄漏的气体。阀门将一直打开，直到大气压力、曲轴箱真空压力和弹簧力的合力达到平衡状态[图2-13(c)]。产生的泄漏气体越多，膜片内侧的相对真空压力越小，调压阀的开度越大。这将使曲轴箱保持规定的真空压力(通常为30毫巴)。

1、细胞毒性是由细胞或者化学物质引起的单纯的细胞杀伤事件，不依赖于凋亡或坏死的细胞死亡机理。有时需要进行特定物质细胞毒性的检测，比如药物筛选。2、细胞毒性检测主要是根据细胞膜通透性发生改变来进行的检测，常用以下几种方法。3、MTT、XTT法：利用线粒体内部酶的活性，可以将特定的四唑盐类进行转化，然后通过酶标仪进行检测。4、LDH的方法：通过检测细胞培养上清中LDH的酶活性，来检测细胞毒性。5、其它酶方法：如检测上清中碱性磷酸酶、酸性磷酸酶的活性等。

多用电表只有中间刻度线是直流和交流公用，零刻度线在左侧，从左至右读数均匀增加。用来测直流电流，直流电压，高压交流电的数值。读数时测量值＝（表盘指针示数÷表盘满偏示数）×倍率第二排刻度一共有50个小格，量程是根据实际情况人为 选的。并且读数的时候只允许有一位是估读的。比如说量程就是250V，那每一个小格就是5V，第一个刻线是0，第二个就是5，0和5之间就没有刻线了，那么2、3、4都是估读出来的。扩展资料测量电阻的原理欧姆表是根据闭合电路欧姆定律制成的,它的原理如下图所示,G是电流表(表头),内阻为Rg,满偏电流为Ig,电池的电动势为E,内阻为r。电阻R是可变电阻,也叫调零电阻。1、当红、黑表笔相接时,相当于被测电阻Rx=0,调节R的阻值,使 ,则表头的指针指到满刻度,所以指针指在电流的满偏处,定为电阻刻度的零点。Rg+r+R是欧姆表的内阻。2、当红、黑表笔不接触时,相当于被测电阻Rx=∞,电流表中没有电流,表指针不偏转,此时指针所指的位置定为电阻刻度的∞点。3、当红、黑表笔间接入被测电阻Rx时,通过表头的电流 ,改变Rx,电流I随着改变,每个Rx值都对应一个电流值,在刻度盘上直接标出与I值对应的Rx值,就可以从刻度盘上直接读出被测电阻的阻值。

把模块从FTM模式变为在线模式

这种合金吸收氢后不是形成氢化物