一、mtr 全写是甚么?

The Mass Trit Railway

M=Mass T=Trit R=Railway

MTR

or Mass Trit Railway

is the rapid trit railway system in Hong Kong. The MTR first began service in 1979 and officially merged with the Kowloon Canton Railway (KCR) on 2 December 2007

still bearing the same name in English. The neork includes 211.6 km of rail with 150 stations

including 82 railway stations and 68 light rail stops. The MTR system is currently being operated by MTR Corporation Limited (MTRCL). Due to its efficiency and affordability

the MTR system is a mon mode of public trport in Hong Kong

with over 4 million trips made in an average weekday. The integration of the Octopus *** art card fare-payment technology into the MTR system in September 1997 has further enhanced the ease of muting on the MTR. In 1967

construction of the MTR was prompted by a ernment-missioned study. The Hong Kong Government had previously missioned a study in the 1960s to find solutions to the growing traffic problem caused by the expion of the city's economy.[3] Construction started soon after the release of the study

and the first line was opened in 1979. The MTR was immediately popular with residents of Hong Kong; as a result

subsequent lines have been built to cover more territory. There are continual debates regarding how and where to expand the MTR neork. Mass Trit Railway (MTR) 图片参考：upload.wikimedia/ *** /en/thumb/f/fc/MTR_Corporation.svg/250px-MTR_Corporation.svg Locale Hong Kong

M for Mass T for Train Rfor railway

Mass Trit Railway

二、mtr是什么的检查方法(医学方面)

四甲基偶氮唑盐比色法(methyl thiazolyl tetrazolium,MTr)

MTT（即MTr）方法简介:

四甲基偶氮唑盐比色法（MTT方法），是通过快速简便的颜色反应来检测细胞存活数量其原理是MTT可作为哺乳类动物细胞线粒体中琥珀酸脱氢酶的底物。当有活细胞存在时，线粒体内琥珀酸脱氢酶可将淡黄色的MTT还原成蓝紫色的针状甲月替 (Formazan)结晶并沉积在细胞中，结晶物能被二甲基亚砜 (DMSO)溶解,用酶联免疫检测仪在570nm波长处测定其吸光度OD值，OD值的高低可间接反映活细胞的数量及其活性。

目前MTT法常用于以下几个方面的研究：

1、检测细胞活性：常作为细胞毒性试验的一种方法。

2、体外药物敏感实验：该方法简便、经济、快速，重复性好，所需的细胞数较少，没有放射性，目前广泛的用于临床前的抗癌药物的筛选研究。

3、一些细胞因子活性的研究。

主要实验步骤如下:

1）将对数生长期细胞用胰酶消化后配制成浓度为1-10×104个/ml的细胞悬液，按1000-10000个细胞/孔接种于96孔板，每孔加100μl。

2）将平板置37℃、 5%CO2湿度培养箱中24小时后，加入含有不同浓度受试样本的培养液100μl，每个样本不同浓度设平行的三个孔，对照组加不含样本的培养液100μl，再放入培养箱中孵育24-72 小时，

3）用快速翻板法倒掉培养液，每孔加入用无血清1640按5mg/ml新鲜配制的MTT溶液100μl，温育4小时，使MTT还原为甲 月替，再次倒掉上清液，每孔加DMSO(二甲基亚枫)200μl，用平板摇床摇匀后，使用酶标仪测定光密度值(OD)（参考波长450nm，检测波长570nm），以溶剂对照处理细胞为对照组，按下述公式计算化合物对细胞的抑制率，并按中效方程计算半数抑制浓度IC50：

三、请教：MTR是啥意思

1香港地铁（英语：Mass Transit Railway，缩写：MTR）是香港最大的铁路运输系统

2MTR （Linux中一个网络连通性判断工具）