A reduced data set method for support vector regression

循环系统练习题(含答案)

循环系统练习题(含答案) 《循环系统疾病病人的护理》练习题一、A1型单选题 1、循环系统疾病的常见症状不包括 A、发热 B、心悸 C、呼吸困难 D、水肿 E、晕厥答案：A 2、心源性呼吸困难病人最重要的护理诊断是A、低效性呼吸型态B、体液过多C、清理呼吸道无效D、活动无耐力E、气体交换受损答案：E 3、长期卧床的心源性水肿病人其水肿最早、最明显的部位在A、眼睑B、心前区C、腰骶部D、足踝部E、颜面部答案：C 4、严重心悸病人休息卧床时应避免取A、高枕卧位B、仰卧位C、左侧卧位D、半卧位E、右侧卧位答案：C 5、心前区疼痛最常见的病因是A、肺心病B、高血压病C、风心病D、

冠心病E、心肌炎答案：D 6、心源性晕厥最具特征性的表现是A、头晕B、眩晕C、休克 D、黑矇 E、短暂意识丧失答案： E 7、治疗心力衰竭最常用的药物是A、利尿剂B、血管扩张剂C、洋地黄D、β受体激动剂E、血管紧张素转换酶抑制剂答案：A 8、导致慢性心力衰竭最常见的诱因是 A、呼吸道感染 B、心律失常 C、身心过劳 D、血容量过多 E、不恰当停用洋地黄或降压药等答案：A 9、左心衰竭最重要的临床表现是A、咳嗽、咳痰、咯血B、呼吸困难C、乏力、头晕、心悸D、少尿及肾功能损害E、心脏增大答案：B 10、右心衰竭最常见的症状是A、食欲不振、恶心、呕吐B、水肿、尿少C、乏力、头晕、心悸D、呼吸困难E、咳嗽、咯血答案：A 11、能反映左心功能状况的心导管检查是A、PCWP

B、CO C、CI D、CVP E、血氧含量答案：A 12、能反映右心功能状况的心导管检查是A、PCWP B、CO C、CI D、CVP E、血氧含量答案：D 13、不符合心力衰竭膳食原则的一项是1 A、高热量B、低盐C、清淡、易消化D、产气少E、富含维生素答案：A 14、处理洋地黄中毒不正确的措施是A、减少洋地黄用量B、及时与医生取得联系C、进行心电图检查D、停用排钾利尿剂E、纠正心律失常答案：A 15、除非紧急情况，利尿剂的应用时间一般不选用A、早晨B、上午C、中午D、下午E、晚上答案：E 16、急性心力衰竭的诱发因素不包括A、急性感染B、过度疲劳C、情绪激动D、严重心律失常E、静脉输液过多过快答案：C 17、关于硝普钠治疗的护理措施不正确的一项是A、一般剂量

英语作文关于共享单车的篇精编

(一) 假定你是红星中学初三学生李华。你的美国朋友Jim在给你的邮件中提到他对中国新近出现的一种共享单车“mobike”很感兴趣，并请你做个简要介绍。请你给Jim回信，内容包括： 1. 这种单车的使用方法(如：APP查看车辆、扫码开锁等); 2. 这种单车的优势; 3. 你对这种单车的看法。 注意：1. 词数不少于80; 2. 开头和结尾已给出，不计入总词数。 提示词：智能手机smartphone, 二维码the QR code 参考范文 Dear Jim, I’m writing to tell you more about the new form of sharing bike mobike mentioned in your latest letter. It’s very convenient to use if you have a smartphone. What you do is find a nearest mobikethrough the APP, scan the QR code on the bike, and enjoy your trip. Compared to other forms of sharing bike, the greatest advantage of mobike is that you can easily find one and never worry about where to park it. It is becoming a new trend as a means of transportation, which relieves the traffic pressure and does good to the environment as well. Hope to ride a mobike with you in China. Yours, Li Hua (二) 最近很多大城市都投放了共享单车(shared bikes)，比如摩拜单车(Mobike)、Ofo共享单车等。由于它们方便停放，骑车也能起到锻炼身体的作用，作为代步工具很受大家欢迎。但是，各地也出现了很多毁车现象，比如刮掉车上的二维码(QR code)、上私锁等。 你对这种现象怎么看?你对共享单车公司有什么建议吗?写一篇符合逻辑的英语短文，80词左右。 参考词汇：bike-sharing companies 共享单车公司，Mobike 和Ofo 是两家共享单车公司，convenience 方便，register登记 参考范文 The shared bikes like Mobike and Ofo bring great convenience to people. You needn’t lock them by simply using your smart phone. They can take you where the subway and bus don’t go. And they can be left anywhere in public for the next user. However, bad things happen. Some people damage the QR code on the bike, or use their own lock, which causes trouble to other users. In my opinion, it’s difficult to turn these people’s ideas in a short time. Therefore, bike-sharing companies like Mobike and Ofo need to do something. For example, those who damage the bike should pay for their actions. Also, because people use their real name toregister as a user, it’s a good way to connect to one’s personal credit. In the end, what I want to say is to take good care of public services. (三) 共享单车(bicycle sharing)已成为时下最热的话题之一，请你就这一话题写一篇短文。内容须包括三方面：1. 共享单车蓬勃发展，成为社会热潮;2. 共享单车带来便利，但也存在问题;3. 我对解决问题的建议。 参考范文 Bicycle Sharing With the development of technology, bicycle sharing comes into people's lives. It becomes more and more popular and much news reported it. At the same time, we should see that there are some problems caused by bicycle sharing. On one side, bicycle sharing makes it very convenient of people traveling. You can find a bicycle anywhere at any time when you want to go out for a cycling, and the price of one trip is very low. It can save time for people. On the other side, its management is not perfect. Even kids can open the lock and ride the bicycle, there is no doubt that such behavior is very dangerous.

介词from的语法特点与用法习惯

介词?f rom的语法特点与用法习惯 1.不要根据汉语意思在及物动词后误加介词?from。如： 他上个星期离开中国去日本了。 误：?H e left from China for Japan last week. 正：?H e left Chine for Japan last week. 另外，也不要根据汉语意思错用介词?from。如： 太阳从东方升起，从西方落下。 误：?T he sun rises from the east and sets from the west. 正：?T he sun rises in the east and sets in the west. 2.f rom虽然本身是介词，但它有时也可接介词短语作宾语。如： Choose a book from among these. 从这些书中选一本吧。 A man stepped out from behind the wall. 一个人从墙后走出来。 比较： I took it from the bed. 我从床那儿（或床上）拿的。 I took it from under the bed. 我从床下拿的。 注意，下面一句用了?from where（引导非限制性定语从句），而未用?f rom which，其中的where=i n the tree，即?from where=f rom in the tree。如： He hid himself in a tree, from where he could see the enemy in the distance. 他躲在一棵树上，从那儿他可以看到远处的敌人。 3.有时其后可接?w hen, where引导的宾语从句，此时可视为其前省略了?t he time, the place。如： He didn’t speak to me from when we moved in. 从我们迁入之时起，他没和我说过话。

介绍北京的英语作文(2)

介绍北京的英语作文(2) AsBeijinghasbeenconfirmedhomecityofOlympics2008,the spiritofgreenOlympics,scientificOlympicsandhumanizedOlymp icwillsurelybringmoreandmorechangestoBeijing,promotethed evelopmentofsportsandOlympicsinChinaaswellasintheworld,a ndstrengthenthefriendlycommunicationsbetweenChineseandf oreignpeople. 篇六：Beijing BeijingisthecapitalofPeoplesRepublicofChinaandthenation scentreforpolitics,economyandculture.Itenjoysalongandrichhis tory.Therearenumerousheritagesitesandwonderfulexamplesof ancientarchitecture,suchastheworld-famousGreatWall,theTem pleofHeavenandtheForbiddenCity. Besidessightseeingplaces,therearemanydeliciousfoodsuch asPekingducksandBeijingsnacks.Beijingisreallyagoodplacetotr avel. 篇七：Beijing AsthecaptainofChina，Beijinghasbeenthemostpopularcityofchina。SomoreandmorepeoplewanttovisitBeijing.

汽车利弊英语作文4篇

[标签:标题] 篇一：关于汽车的英语作文 好的 Nowadays, with the rapid improvement of people’s living standards, cars have become an indispensable part of people's lives,so that more and more people have a car of their own, especially in cities. It brings some benefits for us but also causes many problems at the same time. For one thing,there’s no doubt that cars provide much convenience for people to go where they want to quickly and easily. Especially on weekday,driving a car can save a lot of time for us to go to work.When some places are too far away from our home, driving our own car is also convenient, we can go wherever we want. However,for another, too many cars will lead to the pressure of public transport, a series of problems will appear.First of all,it will bring about more air pollution,a large amount of polluted air given off by cars do great harm to our health.What’s more, as the existing roads are not so wide for the increasing number of cars,undoubtedly,traffic jams will become more and more serious. Last but not least, cars also place burden on the public facilities in providing more parking lots. As far as I am concerned,everything has its advantages and disadvantages. It’s high time that effective action must be token to limit the ever growing number of cars, the government should take measures to control the air pollution from the cars. Some roads should be widened and more new roads should be constructed. Only in this way，will people benefit from the popularity of cars. 坏的 Nowadays, with the rapid improvement of people's living standards, cars have become an indispensable part of people's lives,so that more and more people have a car of their own, especially in cities.It brings some benefit for us but also causes many problems at the same time. For one thing,it's no doubt that that cars provide much convenience for people to go where they want to quickly and easily. Especially on weekday,driving a car can save a lot of time for us to go to work.When some places are too far away from our home, driving our own car is also convenient, we can go wherever we want. However,for another, too many cars will lead to the pressure of public transport, a series of problems will appear.First of all,it will bring about more air pollution,a large amount of polluted air given off by cars do great harm to our health .What's more, as the existing roads are not so wide for the increasing number of cars,undoubtedly,traffic jams will become more and more serious. Last but not least, cars also place burden on the public facilities in providing more parking lots. As far as I am concerned,everything has its advantages and disadvantages. It's high time that effective action must be token to limit the ever growing number of cars, the government should take measures to control the air pollution from the cars. Some roads should be widened and more new roads should be constructed. Only in this way,will people benefit from the popularity of cars. 篇二：雅思作文高分范文：私家车的利与弊 智课网IELTS备考资料 雅思作文高分范文：私家车的利与弊

动名词的语法特征及用法

动名词的语法特征及用法 动名词由动词加－ing词尾构成，既有名词的特征，又有动词的特征。了解动名词的语法特征可帮助学习者深入理解动名词的意义，从而正确使用动名词。 一、动名词的名词特征 动名词的名词特征表现在它可在句子中当名词来用，作主语、宾语、表语、定语。例如： Beating a child will do more harm than good．打孩子弊大于利。（作主语） Do you mind answering my question？你不介意回答我的问题吧？（作宾语） To keep money that you have found is stealing．把拾到的钱留起来是偷盗行为。（作表语） No one is allowed to speak aloud in the reading room．阅览室里不许大声说话。（作定语） 在动名词担任这些句子成分时，学习者需注意的是： 1、有些动词后只能用动名词作宾语，构成固定搭配，需特别记忆。常见的这类动词有：admit（承认），advise（建议），allow（允许）， appreciate（感激），avoid（避免），can't help（禁不住），consider（考虑），deny（否认），dislike（不喜欢），enjoy（喜欢），escape（逃脱），excuse（原谅），feel like（想要），finish（结束），give up（放弃），imagine（想象），involve（包含），keep（保持），mind（介意），miss（错过），permit（允许），practise（练习），quit（停止），recollect （记得），recommend（推荐），suggest（建议），stop（停止），resent（对……感到愤恨、怨恨），risk（冒……危险），cannot stand（受不了）等。例如： We do not permit smoking in the office．我们不允许在办公室吸烟。 In fighting the fire，he risked being burnt to death．在救火中，他冒着被烧死的危险。 She denied having stolen anything．她否认偷过任何东西。 I suggest doing it in a different way．我建议换一个方法做这件事。 2、动名词常用于一些固定句型中，常见的有：It is no use ／no good．．．；It is a waste oftime．．．；It is fun ／nice ／good．．．；There isno．．．（不可以／不可能……）等。例如： It is no use asking him．He doesn't know any more than you do． 问他也没用，他并不比你知道得更多。 It's no fun being lost in rain．在雨中迷路可不是好玩的。 It's a waste of time your reasoning with him．你和他讲道理是在浪费时间。

循环系统复习题(带答案)

单选题 1.典型慢性肺原性心脏病应具备哪一项X线表现？（A ） A、肺动脉高压、右室大 B、肺瘀血、右室大、左房大 C、肺充血、左、右室大 D、肺少血、右室大、主动脉宽 E、肺水肿，心脏普遍大 2.指出不属于肺循环改变的肺部病变是（C ） A、肺充血 B、肺淤血（含肺水肿） C、肺出血 D、肺血减少 E、肺动脉高压 3.心脏正侧位片，显示两肺呈瘀血征，心影呈二尖瓣型，心胸比值为0.53，心影可见左心缘出现四个弓，主动脉弓较小，心尖上翘，心底有双重密度影。应诊断为（ D ） A、慢性肺源性心脏病 B、缩窄性心包炎 C、先天性心脏病房间隔缺损 D、风湿性心脏病二尖瓣狭窄 E、风湿性心脏病二尖瓣狭窄伴关闭不全 4.“二尖瓣型心”的基本特征是（B ） A、右心室增大 B、肺动脉段膨隆 C、主动脉结突出 D、右心房增大 E、心尖向左下延伸 5.只引起左心室负荷加大的主要原因是（B ） A、肺循环高压 B、体循环高压 C、右心回心血量增加 D、三尖瓣关闭不全 E、心房水平左向右分流 6.女性患儿，8岁，自幼心慌、气短、活动受限、易感冒，体检胸左缘第2-3肋间闻及机器样连续性杂音。照片示两肺多血，主动脉结宽，肺动脉段凸出，二者之间填平，左、右心室增大，心及主动脉搏动强烈。应诊断为（ D ） A、动脉导管未闭 B、二尖瓣关闭不全 C、房间隔缺损 D、室间隔缺损

E、法洛四联症 7.女性患者，24岁，因患风湿性心脏病而摄心、大血管远达高千伏心脏后前位和左侧位。照片示二尖瓣型心，心胸比值0、53，左心房和右心室增大，两肺门影增大模糊，上肺门大于下肺门，两肺纹理多而模糊，并有网状影及淡薄的密度增高影为背景。肺部改变应考虑为（ E ） A、肺充血 B、肺动脉高压 C、肺少血 D、肺栓塞 E、肺瘀血 8.男性患者，23岁，右心房、室增大，肺脉动脉段凸出，两肺门大而搏动增强，右下肺动脉干增粗达17mm，两肺纹理增多增粗，边界清晰，肺野透过度正常其肺循环变化是（ B ） A、肺少血 B、肺多血 C、肺淤血 D、肺出血 E、肺栓塞 9.肺循环血流量增多，而左心室、主动脉及体循环血流量减少的先天性心脏病为（C ） A、动脉导管未闭 B、室间隔缺损 C、房间隔缺损 D、法洛四联征 E、肺动脉瓣狭窄 10.心脏右前斜位片主要观察（A ） A、左心房、肺动脉主干和右心室 B、左心室、主动脉弓的全貌 C、右心房、主动脉 D、气管分叉 E、以上全不是 11.右心房增大，下列哪一项是错误的（E ） A、后前位，右侧第二弓增大，右心膈角锐利 B、左前斜位，心前缘上段突出或（和）延长 C、右前斜位，心后缘下部向后突出 D、右房增大常发生在房缺 E、右房增大多为室缺所致 12.指出引起左心房增大的疾病（A ） A、风湿性心脏病——二尖瓣狭窄

介绍北京的英语作文1篇 .doc

介绍北京的英语作文1篇 篇一MyFamily Ilovemyfamily,becauseIhaveahappyfamily. MyfatherisanEnglishteacher.HisnameisJacky.Heisthirty-eight.Helikesplay ingbasketball.What’smymotherjop?Issheateacher?Yes,you’reright!Mymotherisverykindandnice,sheisthirty-seven.Mymotherisalways laboriouswork.Ilovemyparents! OnStaurdayandSunday,Ioftengotothelibraryandplaythepiano,Myfathergot oplaybasketball.Sometimes,wewatchTVandlistentomusicathome. Ilovemyfamily.BecauseI’mveryhappytolivewithmyparentstogether! 篇二MyFamily MyFamily Everyonehasafamily.Weliveinitandfeelverywarm.Therearethreepersonsin myfamily,mymother,fatherandI.Welivetogetherveryhappilyandtherearema nyinterestingstoriesaboutmyfamily. Myfatherisahard-workingman.Heworksasadoctor.Healwaystrieshisbesttoh elpevery,patientandmakepatientscomfortable.Butsonetimesheworkssohard thathecan”trememberthedate.

循环系统练习试题(含答案解析)

《循环系统疾病病人的护理》练习题 一、A1型单选题 1、循环系统疾病的常见症状不包括 A、发热 B、心悸 C、呼吸困难 D、水肿 E、晕厥 答案：A 2、心源性呼吸困难病人最重要的护理诊断是 A、低效性呼吸型态 B、体液过多 C、清理呼吸道无效 D、活动无耐力 E、气体交换受损 答案：E 3、长期卧床的心源性水肿病人其水肿最早、最明显的部位在 A、眼睑 B、心前区 C、腰骶部 D、足踝部 E、颜面部 答案：C 4、严重心悸病人休息卧床时应避免取 A、高枕卧位 B、仰卧位 C、左侧卧位 D、半卧位 E、右侧卧位 答案：C 5、心前区疼痛最常见的病因是 A、肺心病 B、高血压病 C、风心病 D、冠心病 E、心肌炎 答案：D 6、心源性晕厥最具特征性的表现是 A、头晕 B、眩晕 C、休克 D、黑矇 E、短暂意识丧失 答案：E 7、治疗心力衰竭最常用的药物是 A、利尿剂 B、血管扩剂 C、洋地黄 D、β受体激动剂 E、血管紧素转换酶抑制剂 答案：A 8、导致慢性心力衰竭最常见的诱因是 A、呼吸道感染 B、心律失常 C、身心过劳 D、血容量过多 E、不恰当停用洋地黄或降压药等 答案：A 9、左心衰竭最重要的临床表现是 A、咳嗽、咳痰、咯血 B、呼吸困难 C、乏力、头晕、心悸 D、少尿及肾功能损害 E、心脏增大 答案：B 10、右心衰竭最常见的症状是 A、食欲不振、恶心、呕吐 B、水肿、尿少 C、乏力、头晕、心悸 D、呼吸困难 E、咳嗽、咯血 答案：A 11、能反映左心功能状况的心导管检查是 A、PCWP B、CO C、CI D、CVP E、血氧含量 答案：A 12、能反映右心功能状况的心导管检查是 A、PCWP B、CO C、CI D、CVP E、血氧含量 答案：D 13、不符合心力衰竭膳食原则的一项是

汽车的重要性《英语作文》

汽车的重要性《英语作文》 The automobile has become one of the most important means/ways of transportation in the world since it was invented. The automobile has completely changed the lifestyles of almost all the people in the world. In the past, animals like horses and camels were used for traveling and transporting goods. Automobiles are more comfortable and faster. Automobiles have also made it possible for us to transport large quantities of goods and people at the same time. Besides, the invention of the automobile has provided jobs for millions of people all over the world. 翻译： 汽车已经成为世界上最重要的交通工具之一，因为它是发明的。汽车已经完全改变了世界上几乎所有的人的生活方式。 在过去，像马和骆驼的动物被用来运送货物。汽车更舒适，更快速。汽车也使我们能够在同一时间运送大量货物和人。 此外，汽车的发明为全世界上百万的人提供了工作。

法语语法-名词的特点和用法

{1} 1. 名词（le nom, le substantif）的特点 名词是实体词，用以表达人、物或某种概念，如：le chauffeur（司机），le camion（卡车），la beauté（美丽）等。 法语的名词各有性别，有的属阳性，如：le soleil（太阳），le courage（勇敢），有的属阴性，如：la lune（月亮），la vie（生活）。名词还有单数和复数，形式不同，如：un ami（一个朋友），des amis（几个朋友）。 法语名词前面一般要加限定词（le déterminant），限定词可以是数词、主有形容词，批示 形容词或冠词。除数词外，均应和被限定性名词、数一致，如：la révolution（革命），un empire （一个帝国），cermarins（这些水手），mon frère（我的兄弟）。https://www.sodocs.net/doc/224470074.html, 大部分名词具有多义性，在文中的意义要根据上下文才能确定，如： C’est une pluie torrentielle.（这是一场倾盆大雨。） Lorsque rentre la petite fille, c’est sur elle une pluie de baisers.（当小姑娘回家时，大家都拥上去亲吻她）。 第一例, pluie是本义，第二例, pluie是上引申意义。 2. 普通名词和专有名词（le nom commun et le nom propre） 普通名词表示人、物或概念的总类，如：un officier（军官），un pays（国家），une montagne （山），la vaillance（勇敢、正直）。 专有名词指特指的人、物或概念，如：la France（法国）。 专有名词也有单、复数；阴阳性。如：un Chinois（一个中国男人），une Chinoise（一个中国女人），des Chinois（一些中国人）。 3. 普通名词和专有名词的相互转化（le passage d’une catégorie àl’autre） 普通名词可转化为专有名词，如：报刊名：l’Aube（黎明报），l’Humanité（人道报），l’Observateur（观察家报）等报刊名称是专有名词，但它们是从普通名词l’aube（黎明），I’humanité（人道），l’Observateur（观察家）借用来的。 专有名词也可以转化为普通名词，意义有所延伸，其中许多还保持第一个字母大写的形式，如商品名：le champagne（香槟酒），une Renault（雷诺车），le Bourgogne（布尔戈涅洒）。以上三例分别来自专有名词la Champagne（香槟省），Renault（雷诺，姓），la Bourgogne（布尔戈涅地区）。 4. 具体名词和抽象名词（les noms concrèts et les noms abstraits）

我想去北京英语作文

三一文库（https://www.sodocs.net/doc/224470074.html,） 〔我想去北京英语作文〕 我想去北京的英语作文如何写？那么，下面是小编给大家整理收集的我想去北京英语作文，供大家阅读参考。 我想去北京英语作文1 I’d like to go to a beautiful place. I think it would be Beijing. Beijing is not only our capital city, but also a famous city with long history and wonderful culture. Beijing is also China’s political and cultural center. There’re many old places of great interest, such as the Great Wall, the Summer Palace, the Forbidden City, the Temple of Heaven, and Tiananmen Square. Once you see Tiananmen Square, you will think of Beijing. It has been the symbol of Beijing since 1949. 我想去北京英语作文2 I went to Beijing more than eight times. Beijing is the capital of China. It’s a big city. I am very familiar with Beijing. It takes an hour and forty minutes from Nantong to Beijing by plane. There are many tall buildings in Beijing. It’s a modern city. My family visited the Great Wall, the Summer

循环系统试题

第九章循环系统 一、自测试题 （一）选择题 单选题 1．内皮细胞得特征结构就是（） A、发达得高尔基体 B、细胞间１0－20ｎm得间隙 C、丰富得紧密连接 Ｄ、W—P小体 Ｅ、丰富得质膜小泡 ２.关于内皮细胞得结构，下列哪项就是错误得（） A、细胞衣 Ｂ、紧密连接 C、吞饮小泡 D、微管成束 E、W—P小体 ３、内皮细胞内Ｗ—P小体得功能就是( ) Ａ、分泌作用 Ｂ、物质转运 C、吞噬功能 D、止血凝血 E、传递信息 ４.关于W—P小体得结构与功能,下列哪项就是错误得（ ) A、多条平行细管 Ｂ、内皮细胞特殊得细胞器 C、合成与储存凝血因子 Ｄ、合成与储存第Ⅷ因子相关抗原 E、与止血凝血功能有关 5。内、外弹性膜最明显得血管就是( ） A、大动脉

C、小动脉 D、中静脉 E、大静脉 6.关于中动脉得结构,下列哪项就是错误得（ ) Ａ、内弹性膜明显 B、三层结构明显 Ｃ、环行平滑肌较多 D、内皮下层明显 Ｅ、外弹性膜明显 7.导致老年人血管硬化增加得因素不包括（） A、平滑肌减少 Ｂ、内膜钙化 Ｃ、血管壁增厚 D、弹性膜减少 E、脂类物质沉积 8．以下称为肌性动脉得就是（ ) Ａ大动脉 B.中等动脉 Ｃ、主动脉 Ｄ微动脉 E.肺动脉 9.以下称为弹性动脉得就是（ ) A 微动脉 B中等动脉 C、小动脉 A、大动脉 B、肾动脉 10.称为外周阻力血管得就是( ） Ａ.大动脉

C.股动脉 Ｄ。肺动脉 E．小动脉 1１．中等动脉中膜得主要成分就是( ） Ａ。胶原纤维 B。平滑肌纤维 Ｃ。弹性纤维 D。网状纤维 E.弹性膜 12。以下哪种血管管壁不具有营养血管( ） A。大动脉 B．大静脉 Ｃ．中等动脉 D．中等静脉 Ｅ。微动脉 １3．以下哪种管壁得中膜与外膜厚度大致相等（ ) A.大动脉 B．大静脉 C。中等动脉 D.中等静脉 E．心脏 14。毛细血管得构成就是( ） A、内膜、中膜与外膜 B、内皮、基膜与1~2层平滑肌 C、内皮与基膜 D、内皮、基膜与少量周细胞 Ｅ、内膜与外膜 15.毛细血管管壁中具有分化能力得细胞就是（ ) Ａ、周细胞

汽车英文演讲稿

汽车英文演讲稿 篇一：汽车英语演讲稿 Good morning everyone ,today, the topic of my lecture（演讲） is “Do you love automobiles（'tmbilz）”. before I start my speech ,I want to ask a question,did there anybody present had seen the movie”the Fast and the Furious['fjrs]”.There are many cars of different styles in the movie,for example ,when you see the movie,you can find roadsters（跑车） just like Porsche（保时捷） GT3,sports utility (通用的）vehicles （车）SUV such as Volkswagen ['f:lks,va:gn]Touareg ['twɑ:reɡ](大众途锐）,even armored cars ,all of them are so powerful and beautiful. When I was a child,I dreamed I can have a car like FORD GT 40,this racing bike（跑车） is amazing and fantastic,but as time goes on ,my hobby is changing,now my favorite car is Jeep Rubicon,this is a car I really want ,it’s dynamic performance（性能） and off-road （越野） performance is top-ranking（一流的） ,which other ordinary SUV is unable to compare; the shape and color of this car is magnificent (华丽的） [mg'nfs()nt],and it’s gear-shift system（齿轮转

常见系动词的分类及使用特点

常见系动词的分类及使用特点 系动词词义不完整，在句中不能单独使用（除省略句外），后面必须接有表语，系动词和表语一起构成合成谓语。常见的系动词大致可分为三类。 第一类：表示特征或状态的，有 be, look, feel, seem, appear, smell, taste, sound, turn out（结果是、证明是）等。 You'll be all right soon. You don't look very well. I feel rather cold. He seems to be ill. It appears that he is unhappy. The roses smell sweet. The mixture tasted horrible. How sweet the music sounds! The day turned out (to be）a fine one. 第二类：表示从一种状态到另一种状态的变化，有 become, get, grow, turn, fall, go, come, run 等。 He became a world-famous scientist. It is getting warmer and warmer. It grew dark. The food has turned bad. Yesterday he suddenly fell ill. Mary's face went red. His dream has come true. The boy's blood ran cold. 第三类：表示保持状态的，有keep, remain, continue 等。 Keep quiet, children! The weather continued fine for a long time. It remains to be proved. 系动词后的表语可以是名词、代词、数词、形容词、分词、动名词、不定式、副词、介词短语、词组、从句，系动词 be 可用于上述所有情况。如： The people are the real heroes. (名词) That's something we have always to keep in mind. (代词) She is often the first to come here. (数词) She is pretty and wise. (形容词). The news was surprising. (分词) His job is teaching English. (动名词) The only method is to give the child more help. (不定式） I must be off now. (副词) The bridge is under construction. (介词短语) That would be a great weight off my mind. (词组) This is why he was late. (从句) 系动词的使用特点： 1、所有的系动词都可接形容词作表语，此处略举数例。