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

精英家教網 > 初中英語 > 題目詳情
Researchers have announced the result of two studies on the health effects of the drug aspirin(阿斯匹林). One study shows aspirin can sharply reduce the chance that a healthy, older man will suffer from a heart attack.
The study offered two new results from earlier findings. It said taking one aspirin pill every other day helped only healthy men over the age of fifty. It also said aspirin gave the greatest protection against heart attacks to men with low blood cholesterol(膽固醇) levels.
Earlier in the United States began a major aspirin study in the early 1980s. it included 22,000 healthy men doctors. All were between the ages of forty and eighty-four. More than 11,000 of the doctors took a harmless pill that contained no drug. The men did not know which kind of pill they were taking.
The doctors who took aspirin suffered 44% fewer heart attacks than those taking the harmless pill. 139 men who took aspirin suffered from heart attacks. Ten of them died. 239 men who didn’t take aspirin suffered from heart attacks. Twenty-six of them died.
The researchers said the doctors’ study provides clear proof that taking aspirin can prevent a first heart attack in healthy, older men. They said ,however, the result does not mean every man over the age of fifty should take aspirin. They said aspirin couldn’t help men who do not eat healthy foods, who smoke cigarettes and who are fat. The researchers said men who think they would be helped by taking aspirin should talk with their doctors first.
小題1: The passage tells us that the new use of aspirin is___________.
A．to treat heart disease.
B．to reduce pain while one suffers from a heart attack.
C．to help old people to be more healthy.
D．to reduce the chance of a heart attack in old men.
小題2:Aspirin can help those who___________.
A．work as doctorsB．are under 40 years old
C．are fat and smoke cigarettesD．are older and healthy
小題3:From the experiment we can conclude that about _________ of people who suffered from heart attacks without aspirin died.
A．7%B．11%
C．19%D．44%
DD  B

小題1:根據第一段One study shows aspirin can sharply reduce the chance that a healthy, older man will suffer from a heart attack.描述,可知選D
小題2:根據第二段It said taking one aspirin pill every other day helped only healthy men over the age of fifty. 描述,可知選D
小題3:根據239 men who didn’t take aspirin suffered from heart attacks. Twenty-six of them died.計算可知26/239=10.87%,約等于11%,故選B
練習冊系列答案
相關習題

科目：初中英語 來源：不詳 題型：完形填空

We have always been warned of the dangers of forest fires. They cause _____ 85 _____ to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be _____86_____  for a forest? People start some of the fires with a special reason to actually do good to the eco-system.
In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can _____87_____ some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place.
Some trees even need fires to grow. These trees hold their seeds (種子) inside. Heat from a fire allows the coat of the seeds to open up. Then the seeds fall to the ground and have the _____88____ to grow/
Scientist, who know about nature’s needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or _____89_____ a after forest fires, they can go hungry _____90_____ their food has been damaged in the fire. Small, controlled fires mean than animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This _____91_____  makes an eco-system.
So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever.
小題1:
A．illnessB．difficultyC．damageD．flood
小題2:
A．helpfulB．powerfulC．harmfulD．awful
小題3:
A．take the place ofB． get ready forC． be bad forD．get rid of
小題4:
A．timeB．waterC．chanceD．skill
小題5:
A．discoverB．coverC．butD．waste
小題6:
A．becauseB．althoughC．butD．so
小題7:
A．almostB．againC．neverD．even

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Earthquakes are hard to predict. but do you know what to do before, during and after an earthquake? Here’s some advice:
Before an earthquake It’s necessary to prepare yourself and your family. All family members should know how to turn off gas, water and electricity and know useful telephone numbers(doctor, hospital, police, 119, etc.). Never put heavy things over beds.
During an earthquake It’s important for each of you to stay calm. If you are indoors, quickly move to a safe place in the room such as under a strong table. The purpose is to protect yourself from objects, stay away from windows, large mirrors, heavy furniture and so on. If you’re cooking, turn off the gas. If you’re outdoors, move to an open area like a playground. Move away from buildings, bridge and trees. If you are driving, stop the car as soon as possible, staying away from bridges and tall building. Stay in your car.
After an earthquake Once the shaking has stopped, DO NOT run out of the building at once. It’s better to wait and leave when it’s safe. Check around you and help the people who are in trouble. If your building is badly broken, leave it. If you smell of hear a gas, get everyone outside and open windows and doors. If you can do it safely, turn off the gas. Report it to the gas company.
小題1:Which of the following is mentioned in the second paragraph?
A．People should know how to turn on gas.
B．People should now how to save water.
C．People shouldn’t put heavy boxes over beds.
D．People shouldn’t forget the phone numbers of others.
小題2:When an earthquake happens, __________can help you deal with it.
A．standing stillB．staying calmC．looking outsideD．moving indoors
小題3: During an earthquake, if you are driving in an open area, you should ________.
A．speed up your carB．stop your car and stay in
C．slow down your carD．stop your car and run out
小題4: When the earth stops shaking , you should_________.
A．check around you firstB．run out of the building at once
C．break the windowns and doors.D．write a report to your company
小題5:You can learn _______after reading the passage.
A．what an earthquake is likeB．what to do to avoid an earthquake
C．how an earthquake happensD．how to protect yourself in an earthquake

查看答案和解析>>

科目：初中英語 來源：不詳 題型：完形填空

There are many kinds of pollution around us,  36  air pollution, soil pollution, noise pollution and light pollution. They are bad __37__ our health in many ways.
Burning gas, oil and coal creates air pollution. It can cause sore eyes and __38__ problems.
With the increase of pollution and the development of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish in the land. Farmers use too many __39___ in the fields. They destroy the soil. So soil pollution has become serious.
Noise pollution can make people__40__. For example, people may lose their hearing if they work in a _41_ place for a long time. Too much noise can cause high blood pressure __42__.
Working for a long time in strong, changeable light __43__ cause some kinds of illnesses. It makes people feel __44__ and is especially bad for the eyes.
With ___45__ pollution, our planet will become greener and our health will be better. Let’s be greener people.
小題1:
A．such asB．for exampleC．as well asD．because of
小題2:
A．toB．inC．forD．of
小題3:
A．breathB．breathe C．breathedD．breathing
小題4:
A．chemicalB．chemicalsC．chemistD．chemistry
小題5:
A．blindB．lameC．deafD．healthy
小題6:
A．noiseB．noisyC．quietD．quietly
小題7:
A．as wellB．tooC．alsoD．either
小題8:
A．mustB．needC．shouldD．may
小題9:
A．comfortableB．possiblyC．terribleD．terribly
小題10:
A．little B．lessC．fewD．fewer

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

What are you going to do if you are in a burning house? How will you escape? Do you know how to save yourself? Please read the following passage．
Escaping a fire is a serious matter．Knowing what to do during a fire can save your life．It is important to know the ways you can use and show them to everyone in the family，such as stairways and fire escapes，but not lifts．
From the lower floors of the buildings，escaping through windows is possible，learn the best way of leaving by windows with the least chance of serious injury．
The second floor window is usually not very high from the ground．An average（平均高度的）person，hanging by the finger-tips will have a drop of about six feet to the ground．It is about the height of an average man．Of course，it is safer to jump a short way than to stay in a burning building．
Windows are also useful when you are waiting for help．Be sure to keep the door closed．Or smoke and fire may be drawn into the room．Keep your head low at the window to be sure you get fresh air rather than smoke that may leaked（滲）into the room．
On a second or third floor，the best windows for escaping are those that open onto a roof．From the roof a person can drop to the ground more safely．Dropping onto cement（水泥）might end in injury．Bushes（灌木叢）and grass can help to break a fall．
小題1:It is important to _______．
A．put out the fire in the burning houseB．know the ways to escape the fire
C．jump off a burning house D．keep the door closed
小題2:It is possible to escape through the windows _______．
A．if there are some bushes on the groundB．if you are strong enough
C．if you live on a lower floorD．If you have a long rope
小題3:Which of the following escaping way is NOT right? _______．
A．You can escape through stairways．
B．You can choose fire escapes．
C．Escape from the windows that open onto a roof．
D．Use a lift to come down at once．
小題4:Open the window so that _______ if the building is on fire．
A．you can get fresh air B．you can call for help
C．you can easily jump off D．you can be seen first
小題5:The best title of the passage is _______．
A．Escaping from the WindowsB．Save Yourself in the Burning House
C．Knowledge on FireD．Waiting for Help

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

We are learning English, but how can we learn English well ? A student can know a lot about English, but maybe he can’t speak English.
If you want to know how to swim, you must get into the river. And if you want to be a football player, you must play football. So, you see, you can learn by using it. You must listen to your teacher in class. You must speak English to your classmates every day and also you must write something in English. Then one day you may find your English very good .
小題1: You know a lot about English, but maybe _______.
A．you can speak itB．you can study it
C．you can’t speak itD．you can’t study it
小題2: You must get into the water _____.
A．to learn how to swimB．to skateC．to jumpD．to play
小題3: If you want to study English well, you must often _______ .
A. speak English to your classmates      B. write something in English
C. listen to your teacher in class         D. A, B and C.
小題4: Which of the best title(標題) for this passage ?
A．How to study swimB．To be a good player
C．How to study English wellD．To learn English well is important（重要）

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Most animals protect(保護) their young until they are old enough to take care of themselves. A fish that swims in the rivers of South America protects its young in a very strange way. This fish, a kind of catfish, uses its mouth to keep its babies from danger(危險).
When this catfish lays(產卵) its eggs, it carries them in its mouth. From what we know, it does not eat during this time. After the eggs hatch(孵化), the fish swims with its young to protect them. It opens its mouth when danger appears(出現), and the tiny fish swim inside. They swim out only when it’s safe again.
These catfish may have a peculiar way to protect their young, but it seems(好像) to work.
小題1:The best title(標題) is _____________.
A．Staying Away From DangerB．How A Fish Protect Its Young
C．Laying EggsD．A Cat That Swims
小題2: The catfish in the story live in _________________.
A．lakesB．the seaC．riversD．North America
小題3:The young fish are ____________________.
A．tinyB．largeC．yellow and goldD．very brave
小題4:If the young fish were not near their parents, they would be ______________.
A．saferB．in greater dangerC．happierD．less hungry
小題5: The word “peculiar” in the story means ________________.
A．easyB．uselessC．strangeD．dangerous

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解


Have you ever seen snow? Many people in the world have not. Some countries never have snow; some have only a little on the tops of very high mountains. In the north of England, there is quite a lot of snow every winter, but in the south of England, there is usually little.
When a student from a warm country comes to England in autumn for the first time, he feels cold at first. There are often dark clouds, grey sky and cold rain in England in autumn, and most students from warm countries do not like this.
But snow is different. Though it is cold, it is also beautiful. Perhaps, after several dark mornings, the student wakes up one day, and there is a lot of light in his room. He thinks “Is it so late?” and jumps out of bed. But no, it is not very late. He looks out of the window and there is the snow on the ground and on the houses and everywhere. The light of his room comes from clean, beautiful snow.
小題1:In which part of England is there much snow in winter?
A．In the east. B．In the north.
C．In the west. D．In the south.
小題2:In the autumn of England, we can NOT often see __________.
A．grey skyB．dark clouds
C．strong winds D．cold rain
小題3: Why does the student ask himself “Is it so late?”
A．Because he has some work to do.
B．Because it is bright in the room.
C．Because it is really late.
D．Because he usually gets up early.
小題4: Which of the following statements is true?
A．Every country in the world has snow in winter.
B．Foreign students like the weather in England.
C．It is often very warm in the autumn of England.
D．Many people in the world haven’t seen snow.

查看答案和解析>>

科目：初中英語 來源：不詳 題型：完形填空

As we know, everyone has problems. And      we don’t deal with our problems, we can easily become unhappy. So how do we deal with our problems? Here are some ways.
By learning to forget
Most of us have probably been        with our friends, parents or teachers. Perhaps they said something you didn't like, or you felt unfair. Sometimes, people can stay angry for years about a small problem. Time goes by, and good friendships may       .
Perhaps we have seen young children playing together. Sometimes they have disagreements, and decide         to each other. However, this usually does not.            for long. This is an important.         for us: we can solve a problem       learning to forget.
By regarding problems as challenges
Many students often complain about       . They might feel they have      work to do sometimes, or think the school rules are too      We must learn how to change these "problems" into "challenges". Education is an important part of our development.      young adults, it is our duty to try our best to deal with each challenge in our education       the help of our teachers.
By thinking of something worse
By comparing.         to other people, you will find your problems are not so terrible. Think about Stephen Hawking, for example, a very clever scientist,     regards his many physical problems as unimportant. He can't walk      even speak, but he has become very famous and successful. Don’t worry about problems. Let's face the challenges instead.
小題1:
A．unlessB．whenC．ifD．while
小題2:
A．pleasedB．interestedC．relaxedD．angry
小題3:
A．be foundedB．lostC．be lostD．find
小題4:
A．don’t talkB．to talkC．not to talkD．to not talk
小題5:
A．happenB．lastC．finishD．stop
小題6:
A．bookB．lessonC．subjectD．magazine
小題7:
A．asB．inC．byD．for
小題8:
A．teachersB．friendsC．classmatesD．parents
小題9:
A．lots ofB．much tooC．many tooD．too many
小題10:
A．relaxingB．strictC．boringD．interesting
小題11:
A．AsB．LikeC．ForD．So
小題12:
A．toB．underC．withD．for
小題13:
A．yourB．ourselvesC．yourselfD．us
小題14:
A．whatB．whoC．whichD．whose
小題15:
A．andB．butC．whileD．or

查看答案和解析>>

同步練習冊答案
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
国产.精品.日韩.另类.中文.在线.播放| 亚洲午夜久久久久中文字幕久| 成人性生交大片免费看视频在线| 国产精品少妇自拍| 不卡免费追剧大全电视剧网站| 国产精品欧美极品| 91亚洲精华国产精华精华液| 亚洲黄色片在线观看| 欧美三级在线播放| 日本视频中文字幕一区二区三区| 91精品国产综合久久福利| 日本欧美肥老太交大片| 精品精品欲导航| 国产黄人亚洲片| 综合久久国产九一剧情麻豆| 在线亚洲高清视频| 日韩专区欧美专区| www亚洲一区| av一本久道久久综合久久鬼色| 综合网在线视频| 欧美日韩一区二区三区四区 | 91精品国产欧美一区二区18| 久久精品国产亚洲高清剧情介绍| 久久夜色精品一区| 99久久精品情趣| 亚洲国产一区二区三区| 欧美zozo另类异族| 成人一级片网址| 午夜视频在线观看一区二区三区| 日韩欧美一级二级三级久久久| 亚洲女人小视频在线观看| 欧美日韩国产综合久久| 国内外成人在线| 亚洲欧美日韩系列| 国产不卡视频在线播放| 一区二区三区欧美激情| 欧美一级国产精品| 成人黄色电影在线| 亚洲不卡一区二区三区| 久久久国产午夜精品| 色综合久久久久综合体桃花网| 人人爽香蕉精品| 国产精品欧美精品| 欧美一区二区三区白人| 成人一区在线观看| 首页国产欧美日韩丝袜| 欧美国产97人人爽人人喊| 欧美色手机在线观看| 精品中文av资源站在线观看| 亚洲素人一区二区| 日韩你懂的在线播放| 91小视频在线| 国内成+人亚洲+欧美+综合在线| 亚洲日本在线天堂| 精品少妇一区二区三区视频免付费 | 亚洲一区二区三区三| 久久美女高清视频| 一区二区三区欧美在线观看| 日韩西西人体444www| 91麻豆免费看片| 国产麻豆日韩欧美久久| 亚洲国产综合色| 中文字幕乱码日本亚洲一区二区 | 欧美日韩另类国产亚洲欧美一级| 国产剧情一区在线| 五月激情综合婷婷| 中文字幕一区日韩精品欧美| 日韩欧美在线综合网| 欧美自拍丝袜亚洲| 风流少妇一区二区| 免费成人在线视频观看| 亚洲最新在线观看| 国产精品免费丝袜| 精品日韩一区二区| 欧美日韩免费一区二区三区| 成人精品视频.| 国产综合色视频| 日韩影视精彩在线| 一卡二卡欧美日韩| 国产精品日产欧美久久久久| 欧美本精品男人aⅴ天堂| 欧美日韩精品一区二区三区四区| 99视频在线观看一区三区| 激情欧美日韩一区二区| 丝袜美腿亚洲综合| 一卡二卡欧美日韩| 亚洲欧美色综合| 国产精品女同互慰在线看| 久久久午夜电影| 欧美www视频| 91精品国产欧美日韩| 欧美性生交片4| 色狠狠av一区二区三区| 成人国产精品免费| 高清在线不卡av| 国产盗摄视频一区二区三区| 蜜桃一区二区三区在线观看| 日韩精品电影在线| 亚洲小说春色综合另类电影| 亚洲精品视频自拍| 亚洲婷婷在线视频| ...中文天堂在线一区| 国产欧美精品一区二区色综合朱莉| jizzjizzjizz欧美| 成人精品在线视频观看| 国产激情91久久精品导航| 国产精品538一区二区在线| 精品亚洲成a人| 国产激情一区二区三区桃花岛亚洲| 日本成人在线网站| 奇米一区二区三区| 蜜桃av一区二区| 美女网站色91| 日韩高清不卡一区二区| 日本精品视频一区二区三区| fc2成人免费人成在线观看播放| 国产一区二区女| 国产一区二区日韩精品| 国产又粗又猛又爽又黄91精品| 久久99国产精品免费| 久久国产精品99精品国产| 激情综合色丁香一区二区| 久久99热99| 亚洲美女区一区| 一区二区三区在线播| 一区二区三区免费| 亚洲成在线观看| 日韩精品五月天| 麻豆国产91在线播放| 狠狠色丁香婷婷综合久久片| 国产乱国产乱300精品| 国产成a人亚洲精| av爱爱亚洲一区| 91久久久免费一区二区| 欧美视频在线观看一区二区| 国产精品一区二区在线观看不卡| 成人在线综合网站| 91麻豆免费观看| 在线不卡欧美精品一区二区三区| 91精品国产一区二区| 久久久精品中文字幕麻豆发布| 国产日韩精品一区二区三区| 亚洲欧美影音先锋| 亚洲无人区一区| 久久综合综合久久综合| 国产乱子伦视频一区二区三区 | 欧美日韩一区中文字幕| 欧美最新大片在线看| 欧美精品成人一区二区三区四区| 日韩一区二区三区精品视频| 久久欧美中文字幕| 中文字幕亚洲一区二区va在线| 亚洲精品伦理在线| 秋霞成人午夜伦在线观看| 亚洲欧美一区二区三区久本道91| 亚洲国产美女搞黄色| 老司机精品视频一区二区三区| 国产高清亚洲一区| 91成人免费在线视频| 欧美一区二区日韩一区二区| 中文字幕欧美三区| 亚洲一区二区美女| 久久精品国产精品亚洲红杏| 成人综合激情网| 欧美日韩国产乱码电影| 欧美精品一区二区在线播放| 亚洲图片另类小说| 欧美韩日一区二区三区四区| 亚洲综合视频在线观看| 久久精品二区亚洲w码| av综合在线播放| 欧美一区二区性放荡片| 中文在线免费一区三区高中清不卡| 亚洲一区二区三区免费视频| 国产在线不卡视频| 欧美性生活影院| 久久人人97超碰com| 亚洲国产色一区| 国产高清不卡一区二区| 欧美在线啊v一区| 色婷婷综合视频在线观看| 日韩精品专区在线| 亚洲裸体xxx| 国产一区二区伦理片| 欧美视频第二页| 国产欧美视频在线观看| 天天综合色天天| 99在线精品视频| 26uuu亚洲综合色欧美| 亚洲电影在线免费观看| 97se亚洲国产综合自在线不卡| 亚洲欧洲99久久| 麻豆精品视频在线| 色综合天天综合网国产成人综合天 | 国产精品一二三四区| 欧美日韩综合不卡| 国产精品拍天天在线| 麻豆精品在线看| 欧美性一二三区| 最近中文字幕一区二区三区|