题目内容

You must notice_________ the emergency exit is when entering the building.

A. where B. what C. which D. in which

练习册系列答案
相关题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

People around the world used their computers to buy goods，communicate with others，listen to music，see pictures and learn about different places and ideas．In 2006，more people around the world used new ways to communicate and connect with each other through the Internet．

1. Blog is a short way of saying Web log．Through these personal websites，people can share their experiences，ideas and opinions with anyone on the Internet．

People of all ages have their own blogs．For young people，they are a way to show their writings and other forms of self-expression．

2. These sites include “MySpace”，used mainly by teenagers and young adults． MySpace is an online community that lets people share messages and pictures with an increasing number of friends． 3.

YouTube is another Internet site that became more popular this year．This website lets anyone create，share and watch short videos．People can watch almost anything on YouTube：news，sports and entertainment events． 4. These include videos of people singing or dancing，or animals doing funny things．Three young men created YouTube almost two years ago as a personal video sharing service．They recently sold it to Google for more than one half billon dollars．

Games and entertainment also became a larger part of the Internet this year．One Internet social site is called Second Life． 5. They get married，build homes，operate businesses，buy and sell goods，work，play and attend school．

A. The blog is one form of communication that enjoys growing popularity．

B. People of all ages use computers to express themselves．

C. It is an online world in which computer users create a new self and live a different life．

D. Many Websites offer free services to create personal Web pages and fill them with writing site on the web.

E. There are music videos，and videos made by people in their own homes．

F. More and more people are buying computers because of the lower price．

G. It is the most popular social networking site on the web．

Here is some information from a tourist guide to Patapsco Valley state Park Maryland, USA.

Wildlife and Nature Appreciation

While visiting Patapsco Valley State Park, you will see a variety of natural habitats. Throughout spring and fall, dogwoods, maples, redbuds, and many varieties of wildflowers color the forest. This park is also home to many small mammals and birds. If you pause during your journey through tile forest, you are likely to see rabbits, grey squirrels, and red foxes. Along the banks of tile river, birdwatchers will spot Canada geese and wood ducks all year round

Fishing

The Patapsco River meanders through the park and is a popular attraction for anglers (钓鱼者). The Department of Natural Resources' Fisheries Service assigns the river as a put-and-take fishery(渔场) with adult rainbow and brown trout in spring and fall. Anglers also enjoy catching naturally reproducing smallmouth and largemouth bass, bluegill, redbreast sunfish and yellow perch.

Fishing opportunities have been specially set aside at Lost Lake for youth under 16 and seniors 62 years of age and older. This area is also designed for anglers with disabilities.

Trails

Adventure seekers will enjoy hiking, mountain biking and horseback riding on the park's popular trail system. More than 17 miles of challenging and rough single track trails follow the ridges, steep hillsides and stream valleys in the park. These trails are also excellent gateways for wildlife viewing, bird watching and general nature appreciation. Please respect the rights of nearby private property owners by using only blazed (有路标的) trails. Remember that the park is a natural area with certain dangers, such as poison ivy, slippery trail surfaces, insects, etc. You are responsible for having the necessary skills, knowledge and equipment for a safe visit.

Discover History Along the Trail

Enter another time as you explore Patapsco’s trails. Layer upon layer of history tells the story of man’s interaction with nature. Native American hunted, gathered and fished here for centuries. In the 1700s, the valley became one of the earliest sites for America’s Industrial Revolution. Early settlers cut down trees for charcoal used to fire iron furnaces(熔炉). The river’s current was dammed and channeled to power iron, paper, grain and textile mills (纺织厂). Towns and tobacco farms were established throughout the valley.

1.Which of the following is forbidden to fish at Lost Lake?

A. A pupil in grade six

B. A 30 - year - old woman without disability

C. An old man in his seventies

D. A person in a wheelchair

2.While walking along the trails, tourists are reminded to _________.

A. feed the birds they meet

B. visit some private buildings

C. pay attention to self- protection

D. protect the natural environment

3.The passage is mainly about the park's _________.

A. long history B. beautiful scenery

C. main attractions D. official rules

Floyd Landis made several lame excuses blaming medicine he had been taking for an injury, but these were all ______.

A. in progress B. in vain C. in turn D. in tune

In fighting with enemies, the economy dropped greatly, ______, many lives were claimed.

A. on top of that B. in contrast

C. for another thing D. above all

The machine has been used for man years. It’s no wonder that it doesn’t work well __________.

A. regularly B. constantly

C. frequently D. occasionally

Our mothers sat us down to read and paint, ____ all we really wanted to do was to make a mess.

A. since B. as C. unless D. when

People who are worried about bad breath often reach for a toothbrush or a gun. But in the future, personal breath monitoring may include far more than fresh breath.

In face, breath is so rich in chemical compounds that fully understanding it has proved challenging. Each breath contains gases like carbon dioxide, the volatile(挥发性的)remains of recent snacks, medicines and even compounds taken in from things like carpeting or various kinds of air pollution. But breath detectors(检测器) can sort out these substances with increasing sensitivity(敏感性)。

Scientists are building electronic sniffers that examine the exhaled(呼气)air for signs of cancer, asthma(哮喘), and other diseases.

“There are clear signatures in the breath for liver(肝)disease, kidney(肾)disease and heart disease. Breath is a rich mixture that can reflect out state of health and disease.” said Dr. Raed Dweik, director of the Cleveland Clinic, adding “Breath analysis is the future of medical testing.”

He and his partners are testing a desktop system called BreathLink for use in rapid identification of diseases. The system is designed to work wherever there is an Internet connection. To use BreathLink, a person breathes into a long tube, and a breath sample is collected and analyzed within the system. Then it can detail chemical concentrations(浓度)of the breath in graphics. Dr. Raed Dweik said, “If you examine patients of asthma, you will find they have higher levels of nitric oxide(一氧化碳) in their exhaled air. It reflects their abnormal symptoms in the lungs.” His tests have reached 85 percent accuracy(精确度)so far in spotting people with some illness.

But some trained dogs, he pointed out, can sniff out cancer with 99 percent accuracy—although without the ability to identify particular compounds the way some detectors can.

“We are getting better and better,” he said. “But whether we will ever approach the accuracy of the dog—we don’t know.”

1.What is the breath detector used for?

A. To find what kind of disease a person has.

B. To identify substances from people’s breath.

C. To help a patient recover from disease.

D. To smell how bad the breath is.

2.In the fifth paragraph, what Dr. Raed Dwik said is meant to______.

A. show how he and his partners treated patients

B. tell why a person has asthma

C. show how sensitive the device is

D. show how to diagnose a patient of asthma

3.It can be inferred that_______

A. brushing teeth can improve one’s bad breath

B. there are leftovers like snacks and medicines in one’s breath

C. one can know exactly about his physical state through the breath

D. breath analysis can be helpful in medical diagnosis

4.What’s the author’s attitude towards the future of breath detectors?

A. Indifferent B. Positive

C. Doubtful. D. Critical.

信息匹配（共1小题）

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

May the first is an important date in the college admission process in the United States．This is the last day for high school seniors to accept or reject offers of admission in the fall．But according to a recent report, there is a great change．Acceptance rates at the top colleges this year were lower than ever．1.

These days, college applicants are applying to more colleges because online and common applications make the process easier．2. On the other hand, deciding students for top colleges to accept can be difficult because it takes much time．Students may not like being put on waiting lists．Also, common colleges work more to get the students they accept to accept them．Some colleges hold visiting days that offer a chance to attend classes and stay overnight．Some universities send gifts． 3.

For many families, the most important thing colleges can do is show them the money, especially this year; the weak economy makes parents nervous． 4. The recent problems that spread from the housing market to credit markets have even affected student’s loans．So lately, top schools have to spare lots of money to increase their financial aid for students．

5. The Education Department expects the number of high school graduates to start to go down．This will happen as the last of the children of the baby boom generation finish high school．The number is not expected to start rising again until 2016．

A．Besides, top colleges are facing changes in the population．

B．What contributes to it?

C．But a mistake can be costly if it happens．

D．But top colleges ignore them．

E．They have international students who know English．

F．It can mean several acceptances to choose from．

G．They cannot afford college as planned．

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网