日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

While income worry is _______ rather common problem of the aged, loneliness is another problem that _______ aged parents may face.
A．a(chǎn); theB．the; /C．a(chǎn); /D．the; the
C

試題分析：句意：對于收入的擔(dān)心是老年人的一個(gè)相當(dāng)普遍的問題，孤獨(dú)是老年父母可能面對的另一個(gè)問題。第一個(gè)空，是泛指“一個(gè)相當(dāng)普遍的問題”，故用不定冠詞a；第二個(gè)空，表示一類人的可數(shù)名詞復(fù)數(shù)形式前，不用冠詞，選C。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：單選題

The speed limit for bicycles on campus is 15 mph, ___________ otherwise posted.
A．unlessB．untilC．sinceD．however

查看答案和解析>>

科目：高中英語 來源：不詳 題型：改錯(cuò)題

In the past my hometown was used to be a beautiful place. Thick trees and green grass could be seen in everywhere. In order to build house and grow more crops, people cut down more and more trees. With time went on, the whole forest was almost destroyed. Gradually the green hills have changed into wasteland. As a result, sandstorms struck us now and then, of which we suffer a lot. However, I do hope all the people should realize the terribly result of not caring about our environment. What's more, they should take good care of the forests and plant trees instead cutting them down to improve our living conditions. 

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Nelson Mandela, who was elected ______ president of South Africa in 1994, is generally regarded as______ father of the country.
A．the; theB．/; theC．/; /D．the; /

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

--- Is this the first time you ___ Xiamen?
--- No. But the first time I ____ here, the city wasn’t so beautiful.
A．visited, comeB．visited, have comeC．have visited, cameD．have visted, have come

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Glass is obviously a wiser choice for the plate as it can easily be recycled and does not take hundreds of years to _____ like plastic.
A．break off B．break out C．break down D．break into

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（不多于3個(gè)單詞）或括號內(nèi)單詞的正確形式。
David and Jack are talking about cyber-relationships in their dorm.
David: Jack, you spend a lot of time on the Internet everyday. What do you most frequently use it for?
Jack:  I usually surf 小題1: net, read news and anything I am interested in, check emails or chat with other people. Sometimes I order online too. Maybe I can find a girlfriend online like a fairy tale.
David: Well, I see. That’s 小題2: you are so stuck to it.
Jack:  I know dozens of websites provide dating service. Curiosity and the need for companionship make them a sure-fire business. I recommend that you 小題3:  (try) Baihe.com.
David: To be小題4:  , I really can’t understand how 小題5:  people depend on that way to make friends. It’s kind of risky.
Jack:  Yes, but it’s also one of the easiest and fastest ways to meet new people.
David: Sounds good. But it is full of traps on the Internet, and some people have really 小題6: (please) experience about online dating.
Jack:  It’s true, but some people did find their better-half through online dating.
David:    小題7:  , I won’t try that way to make my girlfriend.
Jack:  Don’t be so sure. If you 小題8:  (happen) meet a girl online who is intelligent, kind, honest, and you get a good feeling of her, won’t you have the desire to get to know her 小題9: person?
David: I won’t have such a chance in the first place, for I never enter the chatroom.
Jack:  Maybe 小題10:  man’s meat is another’s poison.   
David: That’s right.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

閱讀下面短文，并根據(jù)所讀內(nèi)容在表格中的空格處填入恰當(dāng)?shù)膯卧~。
注意：每個(gè)空格只填一個(gè)單詞。
“HEARTLESS”— a word you wouldn’t want to use to describe a person. But having his heart removed was what saved Craig Lewis’ life—and what made him the first living “heartless” man.
The 55-year-old，dying of heart disease，was told he only had 12 hours to live， when Billy Cohn and Bud Frazier, doctors from the Texas Heart Institute, decided to try something new. They removed Lewis heart and replaced it with an artificial (人造的) one. Less than a week after the operation, Lewis was able to sit and speak.
Lewis kept on living like a normal person, with only one difference—he didn’t have a heartbeat. The human heart usually pumps blood through our bodies by beating regularly. By contrast, this artificial heart pushes the blood forward with two moving blades(槳葉). If you were to touch Lewis or listen to his chest, you would not feel a heartbeat. If you hooked him up to an EKG(心電圖) machine, the line would be flat.
Scientists have been trying to create a working artificial heart for years. Until now, all artificial hearts either broke down or caused blocks and infections.
But after five years of hard work, Dr Cohn and Dr Frazier developed this artificial heart. It is smaller and quieter than other artificial hearts and can last much longer. They tested it on 38 calves (牛犢) and all of them turned out energetic and healthy. Lewis is the first human proof that the machine is a success.
The doctors will have to work more on the device and decide on a final design before it can be widely used. The US Food and Drug Administration will also need to say that the machine is safe. But this artificial heart looks likely to bring a ray of hope to thousands of patients.
Passage outline
Supporting details
A 小題1:     in the history of medicine
◆ 55-year-old Lewis was on the
小題2:      of death. He was told that he only had 12 hours to live.
◆ Two     American  doctors had his heart
小題3:     and replaced it with an artificial one.
That made Lewis the first living heartless man.
Differing from the human heart
◆ Lewis’ new heart pushes the blood forward with two moving blades.
◆ His heart rate is at 小題4:     with a
小題5:     line on the screen of an EKG
machine.
小題6:     of this artificial heart
◆ It is smarter and quieter than other artificial hearts and can last much longer.
◆ It hasn’t yet broken down. Nor has it got
小題7:     and infected.
Reasons for being小題8:  about this artificial heart.
◆ The doctors will have to further
小題9:     the device before it is massively produced.
◆ Yet this artificial heart looks likely to bring the opportunity of 小題10:   to thousands of patients.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

(2013·高考湖北卷)In much of the animal world，night is the time________for sleep－pure and simple.
A．set asideB．set down
C．set offD．set up

查看答案和解析>>
主站蜘蛛池模板： 久操国产| 99一区二区 | 91理论片午午伦夜理片久久 | 91一级片| 一区二区在线免费观看 | 欧美精品一区二 | 欧美激情综合五月色丁香 | 国产高潮在线观看 | 日韩视频免费大全中文字幕 | 日本中文字幕在线视频 | 免费av网站在线观看 | 色爽 | 第一福利视频导航 | 久久99精品国产麻豆91樱花 | 天天操狠狠干 | 日韩精品视频免费 | 四虎网站| 成人三级在线 | 又黄又爽又色视频 | 亚洲做受高潮无遮挡 | 国产黄色一区 | 日韩激情一区二区 | 亚洲视频中文字幕 | 三级黄色片 | av天天看 | 热久久久久 | 久久久久久久综合 | 极品白嫩少妇无套内谢 | 99精品视频在线观看 | 久久久免费观看 | 中国女人真人一级毛片 | 一级免费黄色片 | 韩日中文字幕 | 中文字幕在线免费播放 | 国产高潮在线 | 久久精品一区二区三区四区 | 一区二区三区视频在线 | 99精品视频在线观看 | 亚洲伦理精品 | 亚洲精品中文字幕乱码三区91 | 成人国产在线 |