精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区

The flu is believed ______ by viruses that like to reproduce in the cells inside the human nose and throat.

A. to be caused                   B. to have caused               C. being caused                   D. causing

 

【答案】

A

【解析】

試題分析:句意:流感被認(rèn)為是由在人類鼻腔和喉腔細(xì)胞內(nèi)繁殖的病毒引起的。名詞+be+believed/said/reported+不定式”相當(dāng)于“It is believed/said/reported that…”,可以看作是一個句型。flu與cause之間是一種動賓關(guān)系,所以應(yīng)該用動詞不定式的被動式,選A.

考點:考查非謂語動詞。

 

練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:2011屆云南省昆明一中高三第一次月考英語卷 題型:閱讀理解

There is a joke among flu researchers: “If you've seen one flu season, you've seen one flu season.” The joke is about the unpredictable nature of the flu virus. Every year it looks different, and every strain (類型) follows its own pattern — it's the reason why new strains like H1N1 are extremely difficult to predict.
Dr. Michael Osterholm is a former adviser to the U.S. Department of Health and Human Services. “I know less about influenza today than I did 10 years ago,” he says in a joking way. “Every stone we've turned over, we get more questions.”
The flu rectums every season and the world experiences terrible pandemics (全國或全世界范圍流行的疾病), but researchers still do not understand why some strains infect people and others do not; they are not entirely sure about how the flu is transmitted; nor do they understand why some patients become seriously ill while others develop mild symptoms (癥狀). As a result, when a new strain shows up — like H1N1 — they often have little information to fall back on, and the lessons of previous pandemics are only somewhat helpful. While researchers are still putting together a complete picture of H1N1, for example, its most striking difference with the seasonal flu is that the elder1y are not the most vulnerable (易受攻擊的) population.
Influenza's unpredictable nature makes it a moving target for researchers, says researcher Allison Aiello at the University of Michigan. “Even if we had complete seasonal flu data from the past, it wouldn't be much helpful for a new strain of influenza,” she explains.
Whi1e researchers are frustrated by the holes in their knowledge, they say, however, that the pub1ic--health community is generally doing a very good job responding to H1N1 with seasonal flu data that do exist. Studying influenza, says Osterholm, is “l(fā)ike looking through the windows of a house you can't get into because the door is locked.” Gathering the data researchers do have is like “l(fā)ooking through the windows to get a pretty good picture of what the inside looks like.”
One thing researchers do know for sure: the best way for people to protect against H1N1 is to get the vaccine once it becomes available to them.
【小題1】What do we learn about H1N1 from the passage?

A.In fact it is not a kind of influenza virus.
B.It is quite possible to predict it in theory.
C.Old people are more likely to contract it than kids.
D.Receiving vaccines will be effective to protect against it.
【小題2】 The underlined phrase “fall back on” in Para. 3 probably means      .
A.rely onB.pass onC.col1ect D.exchange
【小題3】 What do we know about previous seasonal flu data?
A.It is useless to study them.
B.It is still necessary to study them.
C.They are misleading most of the time.
D.They are much more helpful than expected.
【小題4】Which of the following could be the best title for the passage?
A.Outbreaks of the fluB.Symptoms of the flu
C.Mysteries of the fluD.Risks of the flu

查看答案和解析>>

科目:高中英語 來源:2011屆福建省四地六校聯(lián)考高三上學(xué)期第二次月考英語卷 題型:閱讀理解

With winter fast approaching, flu season is here. People can easily catch the flu bug and they try to fight it with western medicine, traditional Chinese medicine or some homemade secret recipes. Yet some of these strategies are ineffective or even harmful, the best way to counter the flu is to protect us from contracting(感染)it. So here are some good habits to protect people from contracting flu from the very beginning.
●During the day, keep the bedroom window open to let fresh air in.
●Wash your face with cold water in the morning and wash your feet with hot water in the evening. This practice can help boost blood circulation and improve the body's resistance.
●Do some exercises in the morning. such as jogging or shadowboxing(太極拳)for 10 minutes.
●Rinse(漱) your mouth with salt water or tea every morning and every evening. This can help kill flu bacteria, clear phlegm(痰)and keep the mouth fresh.
●Wear more clothes when it's cold and take some off when it's warm
●Get a bottle of vinegar or Chinese white wine at hand and smell it now and then. Their pungent smell can help people get refreshed and improve their body's resistance.
● Drink two kinds of beverages(飲料)before going to bed, which can help people stay away from the flu: soup made of radish(蘿卜)and vinegar, and tea made of fresh ginger(生姜).
●Close the doors and windows and put a pot of boiling vinegar in the room Vinegar steam is a good way to kill flu bacteria in the air.
【小題1】 Some people like washing their face with cold water in the morning and washing their feet with hot water in the evening perhaps because______.

A.they want to make themselves handsome or pretty
B.they know it is the best way to kill flu bacteria
C.they think it can strengthen blood circulation and improve their resistance
D.they have developed the good habit of living
【小題2】According to the passage, we can know that the best way to fight the flu is to ______.
A.take western medicine or traditional Chinese medicine
B.a(chǎn)void getting it at the very beginning
C.use some homemade secret recipes
D.drink two kinds of beverages before going to bed in winter
【小題3】 What would be the best title for this passage?
A.Eight habits to keep the flu awayB.The cause of contracting the flu
C.Winter and fluD.How to cure the flu

查看答案和解析>>

科目:高中英語 來源:2012年新課標(biāo)版高中英語選修七 Unit2練習(xí)卷(解析版) 題型:其他題

完成句子

1.他要求把這封信馬上郵走。

He wanted the letter__________  __________  __________ at once.

2.他被選上學(xué)校足球隊隊長后非常激動。

He was thrilled when ______  ______  ______  _____ captain of the school football team.

3.據(jù)說他們在醫(yī)院里正受到良好的照顧。

They are said_______  _______  _______  _______  _______  ________ in the hospital.

4.我明天要到北京去,你有要買的東西嗎?

I am going to Beijing tomorrow.Do you have anything ________  ________  ________?

5.他認(rèn)為應(yīng)邀參加這樣的聚會是一種榮幸。

He thought it an honor________  ________  ________  ________to the party.

6.在他死后的半個世紀(jì)里,人們一直在研究他。

Half a century after his death,he still continued ________  ________  ________

7.——昨天晚上下了一場大雪,峨眉山上一定有很多雪。

——不,我們發(fā)現(xiàn)只有一點,大部分的雪好像都已被吹走了。

——It snowed heavily last night and there must be a lot of snow on Emei Mountain.

——No,we found a little snow,as most of it seemed _______  ________  _______  _____

8.人們認(rèn)為流感是由病毒引起的,這種病毒喜歡在人的鼻孔和咽喉內(nèi)的細(xì)胞中再生。

The flu is believed ________  ________  ________ by viruses that like to reproduce in the

cells inside the human nose and throat.

9.他沒有任何要照顧的人。

He has no one ________  ________  ________  ________.

10.這篇課文對于初學(xué)者們來說是很難理解的。

This text is very difficult for learners __________  __________ .

 

查看答案和解析>>

科目:高中英語 來源:2011-2012年學(xué)年度吉林省高三上學(xué)期第一次月考英語題 題型:其他題

根據(jù)短文內(nèi)容,從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。(共5小題,滿分10分)

Ten ways to Avoid the Flu

l Get a flu shot, particularly if you are 50 or over. In addition, consider a flu shot if you are in regular contact with many people, especially if you live in a dormitory or work in an open-plan office, where hundreds of people are coughing and sneezing in a common area.

l _1. One recent study found that families whose children in daycare were immunized had 42% fewer infections with fever than those whose children weren’t immunized.

l Wash your hands frequently and thoroughly. A quick washing won’t do the trick. _2.

l Keep your hands away from your face to reduce the chance of delivering viruses directly to your eyes or nose. _3.

l Make certain you’re getting vitamin E and other complex vitamins and minerals including A, C and     B. These have properties(特性)that improve immune response. _4.

l Don’t smoke. Smoke stops the hair like cells in the nose and airways from sweeping incoming viruses away before they can infect people.

l Use paper handkerchiefs, not cloth handkerchiefs to reduce spread of infection.

l Reduce stress. Research has shown that immune responses are weakened by stress.

l Get seven to nine hours of sleep a night. Lack of sleep can reduce your immune response.

l _5. Longtime heavy drinkers suffer from more colds and flu than others do, and even regular moderate use of alcohol can weaken immune response.

A.Children who are in a large family are easy to get flu.

B.To kill germs, experts recommend washing with soap for 15 to 30 seconds.

C.One study found that people typically touched their face fifteen times in an hour.

D.Many people are used to touching their faces when the flu is spreading.

E. Discuss with your doctor whether to immunize(使免疫)your children in daycare.;

F. Studies on older mice have shown that those with reduced levels of vitamin E were more likely to be infected.

Reduce alcohol consumption(消費(fèi)量).

 

查看答案和解析>>

同步練習(xí)冊答案
精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区
一区二区三区精品在线| 国产夫妻精品视频| 欧美本精品男人aⅴ天堂| 麻豆精品精品国产自在97香蕉| 欧美xxxx在线观看| 国产精品资源网| 国产精品久久久久久久久晋中| 91麻豆福利精品推荐| 婷婷开心激情综合| 精品欧美一区二区久久| 丁香婷婷综合五月| 亚洲精品中文在线影院| 欧美精品乱码久久久久久按摩| 日本欧美肥老太交大片| 久久久不卡影院| 91视视频在线观看入口直接观看www | 一本久久a久久精品亚洲| 午夜伊人狠狠久久| 26uuu国产在线精品一区二区| 成人av在线影院| 性做久久久久久免费观看欧美| 精品少妇一区二区三区视频免付费| 高清不卡一区二区在线| 一区二区免费在线| 日韩欧美国产麻豆| 菠萝蜜视频在线观看一区| 亚洲一区在线看| 欧美精品一区二区三区久久久 | 欧美一区二区成人6969| 豆国产96在线|亚洲| 亚洲一二三专区| 久久久久久久久久久久久夜| 91亚洲精品一区二区乱码| 奇米影视7777精品一区二区| 国产精品久久一卡二卡| 欧美高清视频在线高清观看mv色露露十八 | 欧美精品高清视频| 成人深夜在线观看| 偷拍自拍另类欧美| 欧美高清在线精品一区| 欧美日韩aaaaaa| 丁香亚洲综合激情啪啪综合| 日韩经典中文字幕一区| 中文av一区特黄| 91精品国产91久久综合桃花 | 欧美影院一区二区| 国产乱人伦精品一区二区在线观看| 一区二区三区在线视频免费| 2014亚洲片线观看视频免费| 色av综合在线| 国产v综合v亚洲欧| 日韩激情一区二区| 1024成人网| 精品噜噜噜噜久久久久久久久试看 | 久久久久9999亚洲精品| 欧美日韩国产综合一区二区三区| 成人一区在线观看| 美女脱光内衣内裤视频久久网站| 亚洲丝袜另类动漫二区| 2020国产精品自拍| 欧美日韩亚洲国产综合| 91在线无精精品入口| 国产在线视视频有精品| 日韩成人一级片| 一区二区三区中文在线| 国产精品系列在线| 91麻豆精品91久久久久同性| 91网站视频在线观看| 国产一区二区三区观看| 日本特黄久久久高潮| 亚洲免费观看在线视频| 欧美国产日韩精品免费观看| 精品日韩成人av| 欧美日韩中文国产| 色偷偷久久人人79超碰人人澡| 国产99久久久国产精品免费看| 久久精品国内一区二区三区| 香港成人在线视频| 一区二区理论电影在线观看| 国产精品麻豆网站| 国产无一区二区| 精品国产凹凸成av人导航| 欧美一区二区在线免费观看| 欧美亚洲日本国产| 色综合天天做天天爱| 成人动漫精品一区二区| 国产91精品一区二区| 狠狠色丁香婷综合久久| 久久91精品国产91久久小草| 日本欧美久久久久免费播放网| 亚洲一区二区三区在线| 一区二区三区精品在线观看| 亚洲男同性视频| 综合久久久久久久| 日韩理论片一区二区| 欧美国产成人精品| 欧美国产一区二区| 中文字幕精品在线不卡| 日本一区二区三区国色天香| 国产日韩av一区| 国产欧美日韩另类一区| 国产欧美日韩综合| 中文在线一区二区| 中文字幕不卡一区| 国产精品久久久久久久久免费相片 | gogo大胆日本视频一区| www.欧美日韩国产在线| 99视频在线精品| 91网上在线视频| 在线影院国内精品| 欧美色综合网站| 欧美人xxxx| 欧美一区二区三区的| 日韩欧美中文字幕精品| 精品日韩成人av| 久久看人人爽人人| 亚洲国产精华液网站w| 亚洲欧洲精品一区二区精品久久久 | 日本道免费精品一区二区三区| 色婷婷av一区| 欧美日韩专区在线| 91精品国产欧美一区二区18 | 欧美一级高清片在线观看| 日韩一级欧美一级| 欧美精品一区二区三区蜜臀| 久久色在线观看| 中日韩av电影| 一区二区国产视频| 午夜精品久久久久久久| 美女视频一区在线观看| 国产一区二区三区国产| av中文一区二区三区| 在线视频观看一区| 91精品久久久久久蜜臀| 精品1区2区在线观看| 国产精品少妇自拍| 亚洲资源在线观看| 免费看日韩精品| 国产suv精品一区二区883| 91色九色蝌蚪| 6080日韩午夜伦伦午夜伦| 欧美精品一区二区不卡| 亚洲欧洲三级电影| 亚洲成人免费视频| 韩国av一区二区三区在线观看| 成年人国产精品| 欧美日韩激情一区二区三区| 欧美精品一区二区三| 最新不卡av在线| 日本欧美一区二区三区乱码| 国产91对白在线观看九色| 色欲综合视频天天天| 欧美一卡在线观看| 国产精品美女久久久久久久| 一区二区三区免费在线观看| 美国毛片一区二区| www.成人网.com| 91精品国产欧美一区二区18 | 国产精品毛片a∨一区二区三区| 亚洲高清免费观看| 国产一区二区三区四区五区美女 | 国产精品综合二区| 在线中文字幕一区二区| 欧美成人video| 亚洲色图视频免费播放| 另类综合日韩欧美亚洲| 99精品久久只有精品| 日韩午夜激情电影| 亚洲日本在线看| 美女高潮久久久| 一本色道久久加勒比精品 | 亚洲精品在线一区二区| 亚洲精品欧美二区三区中文字幕| 久久精品国产网站| 色综合久久久久| 久久久久亚洲蜜桃| 午夜伦理一区二区| 成人高清视频在线观看| 欧美一区二区三区播放老司机| 中文字幕亚洲在| 国产在线视频不卡二| 欧美午夜不卡在线观看免费| 久久久不卡网国产精品二区| 亚洲成人精品影院| voyeur盗摄精品| 精品精品欲导航| 亚洲第一精品在线| 99久久综合99久久综合网站| 日韩美女在线视频 | 丰满少妇久久久久久久| 日韩三级在线免费观看| 亚洲欧美偷拍卡通变态| 国产精品中文字幕日韩精品| 欧美日韩亚洲另类| 日韩一区有码在线| 国产在线精品不卡| 91精品国产黑色紧身裤美女| 一二三四区精品视频| 成人免费毛片高清视频| 精品av久久707|