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梁平城口丰都县人民妇幼保健中医院打胎一般要花多少钱飞排名医院排名巫溪黔江区武隆县妇科检查哪家医院最好的

2018年09月19日 18:31:48    日报  参与评论()人

重庆省妇幼保健院剖腹产需多少钱重庆市人民妇幼保健中医院产前检查好吗秀山土家族苗族自治县做四维彩超哪个地方好 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 let#39;s watch as MIT#39;s 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I#39;m gonna turn on my burner here我将打开我的燃烧器OK, there we go好了So I#39;m 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 that#39;s 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 that#39;s 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They#39;re all carbon-carbon single bonds其中全都是碳碳单键and they#39;re 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That#39;s 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, it#39;s 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 . I#39;ll see you next time但愿大家喜欢这个视频,下次再见 Article/201501/355574栏目简介:《英国节日简介》是英语视频听力下面的子栏目,栏目通过英式英语视频讲解的形式来介绍英国的节日,能够帮助英语学习爱好者更好地了解英国的节日文化传统,从而加深对英语中一些习惯用语的理解,是提高英语文化素养的好材料。 Article/201510/400276重庆妇幼保健医院引产多少钱

璧山潼南区妇科疾病多少钱Extend the life of your cowboy boots by keeping them clean, conditioned, polished, and protected.保持清洁,护理,抛光,并提供适当的保护,延长牛仔靴的寿命。You Will Need你需要Cowboy boots牛仔靴Damp cloth湿布Brush刷子Water水White vinegar白醋Pencil eraser橡皮擦Leather conditioner皮革护理剂Boot cream鞋油Soft cloths软布Boot dryer靴子烘干机Boot tree鞋楦Steps步骤STEP 1 Remove dirt1.清除污垢Remove dirt from your cowboy boots with a damp cloth, followed by a good brushing.用湿布擦掉牛仔靴上的污垢,随后用质量比较好的刷子刷一下。Never use harsh chemicals that can discolor the boot.千万不要使用强效化学物质,以免靴子褪色。STEP 2 Get rid of stubborn stains2.清除顽固污渍Get rid of stubborn sticky stains, such as alcohol or dried soda, by using a solution of equal parts water and white vinegar.清除顽固棘手的污渍,比如酒精和干了的汽水,可以用等量水和白醋的混合溶液来清除。STEP 3 Remove scuffs and marks3.清除磨损和刮痕Remove small scuffs and marks with a pencil eraser.用橡皮擦清除较小的磨损和刮痕。STEP 4 Apply a leather conditioner4.使用皮革护理剂Apply leather conditioner to prevent the boot from drying out and to prevent water from being absorbed into the leather.使用皮革护理剂来防止靴子变干,防止水分被皮革吸收。STEP 5 Keep boots shiny5.保持光泽Keep your boots shiny by applying boot cream, and buff the boots with a soft cloth.刷点鞋油,保持靴子光泽,用软布抛光。Don#39;t forget to condition the soles of the boots.不要忘记保养靴子底部。STEP 6 Allow boots to dry6.让靴子晾干Allow your boots to dry at room temperature or dry them in a boot dryer.让靴子在室温下晾干,或者用靴子烘干机。STEP 7 Use a boot tree7.使用鞋楦Prolong the life of your boots and help maintain their original shape by using a boot tree when you#39;re not wearing them. Do it right or get off the horse.不穿的时候,用鞋楦来保持靴子原本的形状,并延长靴子的寿命。采用正确的方法,否则你就会失败。;My Old Kentucky Home; is the song played when the horses step on the track at the Kentucky Derby.《我的故乡肯塔基》是马走上德比赛马会时播放的歌曲。 Article/201411/342257璧山潼南区打胎哪家医院最好的 栏目简介:;Shanghai Live; focuses on big events in the city and major issues around the world, and presents them in a practical and audience-friendly manner to meet the ever-evolving needs of Shanghai#39;s English-speaking viewers,both local and expatriate.《直播上海英语电台》集中报道城市大事件以及全球热点话题,并以观众喜闻乐见的方式呈现给大家,从而满足上海本地以及上海海外人士的英语需求。 Article/201506/380162江北沙坪坝区人民妇幼保健中医院做人流好吗

重庆市第一人民医院人流要多少钱 American Kids Try Breakfasts From Around the World小朋友试吃各国早餐Oh my gosh!噢天啊!It#39;s like a fermented soybean.这就像发酵的大豆。I know. I just found a dead fish in it. It was gross.我知道。我刚在里头发现一条死鱼。恶心耶。American Kids Try Breakfasts from around the World美国小孩试吃世界各地的早餐Korea韩国These three things look spicy.这三样东西看起来很辣。You don#39;t like that one?你不喜欢那道?They make me go like this.它们让我像这样。It#39;s a peculiar taste.这是个很奇特的味道。Brazil巴西Is that coffee?那是咖啡吗?I think it#39;s weird that kids drink coffee...in Brazil.我认为巴西的小孩喝咖啡很奇怪。I hate coffee.我讨厌咖啡。What#39;s it taste like?那喝起来像什么?Are you serious? Cow poop.你说真的吗?牛便便。Finland芬兰No, I would not eat fish in the morning.不要,我才不要一大早就吃鱼。I know I won#39;t like it; I hate salmon.我知道我不会喜欢这道;我讨厌鲑鱼。This b is pretty soft; it could be my pillow.这个面包满软的耶;它可以当我的枕头。I actually would have this for breakfast.我真的会把这当早餐吃。What country do you think this is from?你觉得这是从哪个国家来的?Africa?非洲?Friland?肥兰?Finland.芬兰。What#39;s Finland?什么是芬兰?It#39;s a country in Europe.那是一个在欧洲的国家。Oh!噢!Okay!好吧!Vietnam越南This doesn#39;t look like a breakfast to me.这对我来说不太像早餐啊。I#39;ve never seen a black egg. Does it taste good?我从来没看过黑色的蛋。它好吃吗?So it kind of has, like, a portable toilet smell and also a rotten egg smell.它有点有个,像是,流动厕所的味道,还有坏掉的蛋的味道。This is delicious!这好好吃!Am I really eating an old egg?我真的在吃一颗老蛋吗?This is really good! It#39;s really good.这太好吃了!真的太好吃了。Poland波兰They taste like french fries, and french fries are good.它们吃起来像薯条,薯条很好吃。Where#39;s Poland?波兰在哪?I don#39;t really study...geometry, whatever that is.我其实没有读...几何学,管它是什么。If I eat a lot, my mom usually calls me a pig. Mom, are you even listening?如果我吃很多,我妈通常会叫我猪。妈妈,你有没有在听啊?Are you full?你吃饱了吗?Mmm-hmm.嗯哼。Netherlands荷兰I don#39;t think my friends would eat this for a breakfast because their mom would say it would be ;too unhealthy.;我不认为我的朋友会吃这当早餐,因为他们的妈妈会说这样就“太不健康”了。This is great!这太好吃了!People have this for breakfast?有人早餐吃这个?I wonder what would happen if I folded it in half.不知道我把它对折会怎样。That should be cut. Okay, cut!那应该是拍好了吧。好,卡! Article/201507/383663重庆治疗宫颈糜烂医院重庆宫颈疾病治疗多少钱

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