当前位置:黑龙江地方站首页 > 龙江新闻 > 正文


2019年08月18日 11:45:09    日报  参与评论()人

福州看男性不育医生宁德看卵巢多囊什么医院好President Barack Obama has trampled over the interests of some very powerful groups by rejecting the Keystone XL pipeline extension project.美国总统奥巴马否决“拱心石”XL输油管道延伸项目,此举伤害了一些强大的利益集团。However environmentalists were overjoyed at the news and said it was time to change American energy policy completely.然而,环保人士对这则消息感到万分高兴,说是时候完全改变美国的能源政策了。This morning, Secretary Kerry informed me that after extensive public outreach and consultation with other cabinet agencies, the State Department has decided that the Keystone XL pipeline would not serve the national interests of the ed States. I agree with that decision.今天上午,国务卿克里告诉我,经过广泛的公众宣传和与其它内阁机构磋商后,国务院已经正式决定“拱心石”XL输油管道不符合国家利益。我同意这一决定。Keystone XL would have taken Canadian tar sands oil, the dirtiest to extract and use, south to Texan refineries, Stopping the pipeline may halt tar sands production, and removes the risk of transit accidents though several US states. Environmentalists also say building Keystone would have been a backward step just when so many nations are taking the sustainable energy route.“拱心石”XL输油管道将从加拿大引进沥青砂油,提取和使用污染严重,南至得克萨斯州的炼油厂,停止管道项目可能会暂停油砂生产,并消除经过美国几个州的运输事故。环保主义者还说,建造“拱心石”输油管道将是一个倒退,现在许多国家都在采取可持续能源路线。The project’s supporters say it would have helped make America more energy-independent, brought business to US refiners, and created jobs over the lifetime of the construction project.项目持者称,这将有助于美国能源独立,给美国炼油厂带来的生意,并在项目建设期创造工作机会。译文属。 /201511/408424南平什么医院做试管婴儿 栏目简介:《趣味青春英语视频》是外语网络电台的精品节目,通过大讲堂的网络课堂形式,能够帮助英语学习者积累一些英语背景知识,并通过互动的教学形式,帮助有效记忆英语知识。本栏目是学习趣味青春英语的好材料。201510/399277栏目简介:《造物小百科How it’s made》介绍了许多东西的制作或者说发明方法,非常实用。其中的英语视频发音地道,内容浅显易懂,过程形象生动,是提高英语听力水平,积累英语知识和一些简单生活常识的好素材。201508/391049宁德去那家医院孕前检查

福州去那精液检查好When I think of alcohol the images that spring to mind一想到酒 我就会顿时联想到are bars the clatter of glasses the pouring of liquids.酒吧里的觥筹交错和杯中美酒And alcohol is just a sort of product that we have created.酒就是人类制造的一种产品But thats not true is it?但事实并非如此In fact you have to go back 80 million years其实 八千万年前to its first and most simple use a poison.酒的最初功效很简单 就是毒药This is a war between different types of bugs of micro-organisms.它是不同病菌和微生物竞争产生的结果Ive come to a cherry orchard in Kent to meet Dr Quain此次我来到肯特的樱桃园咨询奎恩士an expert in microbiology.他是位微生物学专家We talk about yeast bacteria fungi.说到酵母 细菌和真菌What they want is to survive and beat off competitors.物竞天择适者生存的法则同样适用于它们Rotting fruit contains sugars-glucose fructose-things that bugs want.腐烂的水果含有葡萄糖和果糖But yeast has been pretty damn clever.但是酵母非常狡猾What it said was ;Im gonna take some of that sugar酵母说;我要吃点糖;;and Im gonna make something which is a by-product of eating sugar.;;因此我会制造一种新的副产物;And that by-product is alcohol.其实就是乙醇201506/382126福州哪个医院有b超检查输卵管堵塞的 So we like to know if there are double bonds in our food molecules因此我们希望知道食物分子中是否具有双键but how is that determined? 但如何知道呢So this is what a ;happy; carbon hydrogen molecule looks like一个非常;开心;的碳氢化合物分子是这样的but in some cases there are not enough hydrogen atoms但有时,氢原子数目不足and the carbon will have to double bond with another carbon to share electrons碳于是会同另一个碳之间形成双键This molecule这个分子is more reactive than this one比这个分子反应性更强because a carbon-carbon double bond因为碳碳双键is not as stable as a carbon-carbon single bond没有碳碳单键稳定Now lets watch as MITs Dr. John Dolhun uses bromine下面来看MIT的John Dolhun士如何使用溴to test for the presence of double bonds in a big slab of bacon来测试一大块培根中是否存在双键Here he is at the Cambridge Science Festival这是他在剑桥科学节上的演示Im gonna turn on my burner here我将打开我的燃烧器OK, there we go好了So Im gonna take my bacon我夹起这块培根Basically shake it up a bit放在里面摇一摇You can see the red color of the bromine is going away可以看到,红色的溴消失了So Dr. Dolhun heats up a piece of baconDolhun士先是给一块培根加热and adds it to a flask filled with bromine然后将它放入到充满溴的烧瓶中Bromine reacts with anything that has a carbon-carbon double bond溴会同任何具有碳碳双键的物质反应This includes the acrolein thats produced when you cook bacon包括加热培根时生成的丙烯醛which looks like this 丙烯醛是这样的as well as the unsaturated fat thats aly present in the bacon还包括培根中已经存在的不饱和脂肪Unsaturated fats are fat that have carbon-carbon double bonds不饱和脂肪是具有碳碳双键的脂肪Fully saturated fats have no carbon-carbon double bonds完全饱和脂肪是没有碳碳双键的脂肪Theyre all carbon-carbon single bonds其中全都是碳碳单键and theyre the ones that are bad for you饱和脂肪对人危害较大The breaking of the double bond looks like this双键的断开是这样的We can tell that the reaction happens because the red color disappears我们通过红色的消失知道反应发生Thats the bromine reacting with those carbon-carbon double bonds这是溴同碳碳双键的反应In our recording of the experiment, its hard to see the color change实验视频录制中,颜色变化比较难看清So watch again very closely所以请大家再仔细看一遍Hope you enjoyed the . Ill see you next time但愿大家喜欢这个视频,下次再见201501/355574宁德输卵管接通医院排名

晋安区做造影价格With 80 days to go until landing,距离着陆还剩80天时the team are carrying out their toughest test.团队迎来了最严峻的考验A complete rehearsal of the Rovers landing,即好奇号着陆过程的in real time.模拟演练The spacecraft is now reporting,航天器发来信号radio has reached entry interface and things are nominal.无线电信号已接受 一切正常Although its a simulation,尽管这只是模拟演练it feels just like the real thing.却与实战相差无几This is the big day,真是重要的一天which is to say the big night.确切地说是一晚Weve gone through essentially five days of approach,五天来 飞船逐渐靠近火星but now here,现在we have only a few hours left until landing距离着陆只剩几个小时and so its kind of... This is for the money!感觉上 好戏要开场了As they simulate the Rovers final approach to Mars,当他们在模拟好奇号最后的着陆过程时the atmosphere in the control room is good.总控室的气氛却十分轻松Even the scientists have arrived to watch the show.甚至连科学家都来欣赏这场表演Its going really well.一切都很正常Were just under 30 minutes距离登录火星表面until we touch down on the surface of Mars.只剩不到30分钟重点解释:1.carry out 施行;实现例句:He hasnt the funds to carry out his design.他没有资金来施行他的设计。2.go through 经历;检查例句:He thought it his duty to go through the papers.他认为自己有责任检查这些文件。3.touch down (飞机)着陆,落地例句:At last he touched down on the mainland.最后他在大陆上着陆了。 201602/428343 福州附属第一医院做宫腔镜南平造影哪家医院好



罗源县检查精液的医院健分类福州博爱中医院看弱精好不好 福州博爱中医院看病收费会不会很贵 [详细]
南平二院做宫腔镜怎么样 问医面诊福州看卵巢多囊去哪好88健康 [详细]
宁德哪里可以宫外孕手术飞网龙岩那里可以输卵管接通 福州市一人民医院染色体检查好不好费用多少 [详细]
三明市放扎复通费用多少QQ助手南平哪里可以检查怀孕 城市网福州输卵管修复最好三甲医院 [详细]


福建检查阳痿要多少钱 福州治输卵管积水费用都是泡泡分类 [详细]
福州看卵巢多囊大约多少钱 南平一院做人工授孕 [详细]
福州第二人民医院收费贵吗 88互动三明市那个医院做造影排名互动 [详细]
快乐助手福州查生育去哪好 福州去哪家医院检查输卵管造影最好城市解答福州博爱医院微创复通 [详细]