首页 > 学历类考试> 成考（专升本）

网友您好，请在下方输入框内输入要搜索的题目：

请输入或粘贴题目内容搜题

搜题

拍照、语音搜题，请扫码下载APP

题目内容（请给出正确答案）

[主观题]

It used to take Redwood City, California police hours to locate gunfire. Now, they have a

new tool that helps them find the gunfire quickly. This new tool is called the ShotSpotter. The police began using the ShotSpotter in 1995. They wanted to cut down on gunfire in their city.

One ShotSpotter covers a square mile. Eight microphones are put on the roofs of buildings. These microphones pick up gunfire noise. It only takes seven seconds to report the gunfire to the police. Then a red dot on the police map shows where the action is.

The ShotSpotter really works well. It locates the gunfire within 20 to 40 feet plus or minus. Redwood City police are very happy with the ShotSpotter. They think it might have helped catch the D.C. sniper.

ShotSpotters cost a lot of money. One of them sells for $200,000. Despite the cost, ShotSpotters can be a big help in fighting crime.

Eight microphones placed on rooftops ______.

A．talk to police

B．warn the public

C．listen for gunfire

D．play rap music

答案

查看答案

发布时间：2021-11-09

更多“It used to take Redwood City, California police hours to locate gunfire. Now, they have a”相关的问题

第1题

Mr. Jack _____volleyball in the afternoon , but now his leg wounded , ____ in the evening

.

A.used to play … is used to taking a walk

B.used to playing … is used to take a walk

C.was used to playing … used to taking a walk

D.was used to play … used to take a walk

点击查看答案

第2题

It ______ 12 rabbits to test a sample of vaccine, now it takes only 6.A．used to takingB．us

It ______ 12 rabbits to test a sample of vaccine, now it takes only 6.

A．used to taking

B．used to take

C．is used to take

D．was used to taking

点击查看答案

第3题

It only takes a fraction of a second for the computer to do the____which used to take days

.

A.conclusion

B.experiment

C.explanation

D.calculation

点击查看答案

第4题

Therewouldn’tbeenoughwaterforusifwedidn’t_________.A.turntotheoceansformorewaterB.reuseuse

There wouldn’t be enough water for us if we didn’t _________. A. turn to the oceans for more waterB. reuse used water and make use of seawater C. desalt seawater D. take steps to reuse all water on earth

点击查看答案

第5题

What does the author mean by saying " these ' temporary' jobs have a habit of becoming per

manent" ？

A．Once college graduates take a temporary job, they soon become used to it.

B．College graduates have developed the habit of taking temporary jobs.

C．Many college graduates might never find jobs for which they were trained.

D．More and more college graduates are unwilling to change their jobs.

点击查看答案

第6题

You are carrying triethylamine，methyl methacrylate and isoprene in your multiple-product t

anker. Which of the following statements is true？

A.Isoprene may be carried in a cargo tank adjacent to either of the other two cargoes

B.Methyl methacrylate may not be carried in a tank adjacent to a pump room

C.Methyl methacrylate must usually be heated to maintain its stability

D.Portable thermometers are not permitted to be used to take the cargo temperature of triethylamine

点击查看答案

第7题

The water we drink and use is running short in the world.

We all have to learn how to stop wasting our limited water. One of the steps we should take is to find ways of reusing it. Experiments have already been done in this field.

Today in most large cities, fresh water is used only once, then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be filtered and treated with chemicals so that it can be used again, just as it were fresh from a spring.

But even if every large city purified and reused its water, we still would not have enough. Then we could turn to the oceans. All we’d have to do to make use of the seawater on earth is to get rid of the salt.

This process is called desalinization, and it is already in use in many parts of the world.

The way to stop wasting our limited water is to （）.

A.do experiments with water

B.purify the used water and reuse it

C.use fresh water once again

D.make use of seawater

点击查看答案

第8题

根据以下内容回答下列各题, The water we drink and use is running short in the world． We all

have to learn how to stop wasting our limited water. One of the steps we should take is to find ways of reusing it. Experiments have already been done in this field． Today in most large cities, fresh water is used only once, then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be filtered and treated with chemicals so that it can be used again, just as it were fresh from a spring. But even if every large city purified and reused its water, we still would not have enough. Then we could turn to the oceans. All wed have to do to make use of the seawater on earth is to get rid of the salt. This process is called desalinization, and it is already in use in many parts of the world． The way to stop wasting our limited water is to ________.

A.do experiments with water

B.purify the used water and reuse it

C.use fresh water once again

D.make use of seawater

点击查看答案

第9题

When we turn on a tap to get water, or press a switch to get electricity, we do not think

of all the pipes and wires which bring these main services to our homes.

The water is brought from the waterworks to each street by a large underground pipe—a water main. The water in this pipe is then forced by pressure into the smaller pipes which carry it to storage tanks at the tops of the buildings. Other pipes bring the water down from the storage tank to the kitchens and bathrooms in the building.

When the water has been used, it is taken away from the building by drainpipe. These take the waste water to another large pipe under the road—the main sewer. The waste water then flows along the sewer to the sewage works where it is cleaned. This "clean" water is then poured into the sea or into a river, or in some countries, sent back to the waterworks to be used again.

Electricity is also brought to the house by a main, in this case a cable. This cable may be underground or, in country districts, it may hang above ground on pylons. The cable is connected to a meter in the building. This meter measures the amount of electricity that is used in the building. Near the meter there is a master switch which can cut off the supply of electricity. There are also fuse boxes between the master switch and the wires which take the electricity to each of the switches in the building. All these wires, fuses and switches are the "wiring circuit".

It can be inferred from this passage that______.

A．water and electricity are the only main services in our homes

B．the pipes bringing water to our homes are unimportant

C．water is less significant than electricity in our homes

D．we are unaware of how water or electricity is brought to our homes

点击查看答案

第10题

Next time you feel the flu coming on, think twice before reaching for painkillers—they cou

ld do more【C1】______than good. With the flu season【C2】______way across Europe and North America, millions will be taking flu【C3】______, which commonly include painkillers. The general【C4】______advice in the UK and the US is to take painkillers. But although painkillers can make you feel better they also lower fever, which can make the virus【C5】______. The first analysis of the effect of this on the【C6】______shows that painkillers taken at current levels to【C7】______fevers could cause 2, 000 flu deaths each year in the US alone. Fever is thought to be a【C8】______against viruses, because many viruses find it hard to【C9】______above our normal 37 °C. Some studies have shown that lowering fever may【C10】______virus-related infections and increase the amount of virus we can【C11】______on to others. To find out what【C12】______this might have on a flu epidemic, David Earn and his colleagues【C13】______to a 1982 study which showed that ferrets, a【C14】______animal model for human flu produced more【C15】______flu virus if their fevers were lowered with painkillers. Earns team used these findings to estimate how much more virus people with【C16】______flu might produce if their fevers were【C17】______. With the help of a mathematical model, Earns team【C18】______their estimates to the number of people a year in the US who get flu,【C19】______fever and take the drugs. They found that painkillers as used in the US could be increasing the【C20】______of ordinary winter flu by up to 5 per cent.

【C1】

A．hurt

B．pain

C．harm

D．work

点击查看答案

第11题

We have no idea about when men first began to use salt, but we do know that it has been us

ed in many different ways throughout the history.

For example, it is recorded in many history books the people who lived over three thousand years ago ate salted fish. Thousands of years ago in Egypt, salt was used to preserve the dead.

In some periods of history, a person who stole salt was thought to have broken the law. Take the eighteenth century for an example, if a person was caught stealing salt, he would be thrown into prison. History also records that only in England about ten thousand people were put into prison during that century for stealing salt! About one hundred and fifty years ago, in the year 1553, if a man took more than his share of salt, he would be thought to have broken the law and would be seriously punished. The offender' s ear was cut off.

Salt was an important item on the dinner table of a king. It was always placed in front of the king when he sat down to eat. Important guests at the king' s table were seated near the salt. Less important guests were given seats farther away from it.

Thousands of years ago in Egypt, salt was used ______.

A．to punish people who had broken the law

B．to keep dead bodies from decay

C．to keep fish alive

D．to make chemicals

点击查看答案

账号：尚未登录

登录没有账号？去注册

购买搜题卡

下载APP

关注公众号

TOP