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回答题。 Eruptions of Mount Saint HelensOn March 27, the U.S. Government scientists made

回答题。

Eruptions of Mount Saint Helens

On March 27, the U.S. Government scientists made a decision after they predicted the eruption of Mount Saint Helens. They telephoned all state and local officials in the area and told them that a serious eruption was possible at any time, Roads were closed to every one except scientists and forest keepers struggled to keep curious visitors away from the mountain.

Shortly after noon on March 27, Mount Saint Helens erupted for the first time in 123 years. People living north of the mountain heard a loud boom that shook their windows, and airline pilots flying near the volcano soon afterwards described a thick black column of ash and steam shooting more than 2100 meters into the sky.

Later, scientists found that the explosion had made a new crater (大坑 ) in the top of the mountain, not far from the old crater. The north side of the peak now had a huge bulge (凸出部分 ) where rock and ice had been pushed out by the eruption.

A second eruption shook the mountain on March 28. It, too, sent up a column of black ash high into the sky. By March 29, scientists flying over the mountain saw that a second crater formed about 9 meters from the first one. Strange blue flames flickered (闪烁 ) inside the crater and sometimes jumped from one crater to the other.

By April the mountain had erupted several more times and the snow on the north slope of the peak was black with ash. Ash carried by the wind had fallen on towns as far as 240 kilometers away from Mount Saint Helens.

During the first week of April, Mount Saint Helens gave scientists something new to worry about : harmonic tremors (震动 ) recorded by scientists showed a big eruption would happen. All during April and into May Mount Saint Helens continued to shudder (震动 ) and shoot out ash. By April 8, two craters had merged to from a vast hole nearly a half of a kilometer wide and 250 meters deep.

Scientists&39; main worry during this time was the growing bulge of rock and ice on the north face of the mountain. By May 7 scientists feared the worst. Their warnings led Washington Governor to set up safety zones around the mounmin. The inner "red" zone was open to scientists only. The outer "blue" zone was open only to people who got special permits. But in spite of these warnings, some people got past the road barriers and risked their lives trying to get close to the volcano.

＞

American scientists predicted that Mount Saint Helens was to erupt soon. 查看材料

A.Right

B.Wrong

C.Not mentioned

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更多“回答题。 Eruptions of Mount Saint …”相关的问题
第1题
根据以下材料，回答题Older Volcanic EruptionsVolcanoes were more destructive in ancient hist

根据以下材料，回答题

Older Volcanic Eruptions

Volcanoes were more destructive in ancient history， not because they were bigger， but because the carbon dioxide they released wiped out life with greater ease.

Paul Wignall from the University of Leeds was investigating the link between volcanic eruptions and mass extinctions. Not all volcanic eruptions killed off large numbers of animals， but all the mass extinctions over the past 300 million years coincided with huge formations of volcanic rock. To his surprise， the older the massive volcanic eruptions were， the more damage they seemed to do. He calculated the "killing efficiency" for these volcanoes by comparing the proportion of life they killed off with the volume of lava that they produced. He found that for size， older eruptions were at least 10 times as effective at wiping out life as their more recent rivals.

The Permian extinction， for example， which happened 250 million years ago， is marked by floods of volcanic rock in Siberia that cover an area roughly the size of western Europe. Those volcanoes are thought to have pumped out about 10 gigatones of carbon as carbon dioxide. The global warming that followed wiped out 80 percent of all marine genera at the time， and it took 5 million years for the planet to recover. Yet 60 million years ago， there was another huge amount of volcanic activity and global warming but no mass extinction. Some animals did disappear but things returned to normal within ten thousands of years. "The most recent ones hardly have an effect at all，" Wignall says. He ignored the extinction which wiped out the dinosaurs 65 million years ago， because many scientists believe it was primarily caused by the impact of an asteroid. He thinks that older volcanoes had more killing power because more recent life forms were better adapted to dealing with increased levels of CO2.

Vincent Courtillot， director of the Paris Geophysical Institute in France， says that Wignall"s idea is provocative. But he says it is incredibly hard to do these sorts of calculations. He points out that the killing power of volcanic eruptions depends on how long they lasted. And it is impossible to tell whether the huge blasts lasted for thousands or millions of years. He also adds that it is difficult to estimate how much lava prehistoric volcanoes produced， and that lava volume may not necessarily correspond to carbon dioxide emissions.

Why did older volcanic eruptions do more damage than more recent ones？ 查看材料

A.Because they killed off life more easily.

B.Because they were brighter.

C.Because they were larger.

D.Because they were hotter.

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第2题
请根据短文的内容，回答题。 Biological Identification TechnologiesWhen a person walks, the mo

请根据短文的内容，回答题。

Biological Identification Technologies

When a person walks, the movement of his head, trunk, and limbs (肢体) are all reflected in changes in his body. A computer stores these __________ .(51) into a database (数据库). Later,the computer can accurately __________ (52) him according to these changes. This is a new biological identification __________ (53) and it can quickly identify an examinee without disturbing him.＜br＞

Everybody&39;s voice is __________ (54).When a person&39;s voice is recorded by an instrument,his voice frequency spectrum (频谱) is called sound print. __________ .(55) a fingerprint,everybody&39;s sound print is different. How can a computer __________ (56)his sound？ First, his voice is recorded, __________ .(57) allows the computer to become familiar with his voice. It will then turn his sound characteristics into a series of digits (数字). These are the __________ (58)＜br＞

on which the computer can distinguish his voice from another&39;s.＜br＞

We often bring ID cards, work cards, or driving licenses with us to __________(59) our identity. If all these cards are forgotten or lost. How can we prove whom we are？ In __________(60), it&39;s not difficult to prove whom you are, __________(61) your body itself has identifying markers. Some are physiological (生理的) features, such as fingerprints, sounds, facial (面部) types and eye color. The computer can __________(62) to identify you. Suppose your features have already been __________(63)in the database. To identify you, we have to take your picture with a camera and send it to a computer for __________ (64). First, the computer needs to reposition this picture according to the position of your eyes, and then starts to read the __________(65) of your physiological features such as the ratio of your pupil to the whites of your eyes and the shape of your nose. Next, it seeks matching records from the database. Finally, it makes a decision.

_________ 查看材料

A.parts

B.changes

C.positions

D.directions

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第3题
根据以下材料，回答题Exercise Can Replace Insulin （胰岛素 ） for Elderly Diabeties （糖尿病）Mo

根据以下材料，回答题

Exercise Can Replace Insulin （胰岛素 ） for Elderly Diabeties （糖尿病）

Most older people with so-called type II diabetes could stop taking insulin if they would do brisk exercise for 30 minutes just three times a week， according to new medical research results reported in the Copenhagen newspaper Berlingske Tidende on Monday.

Results from tests conducted on diabetics at the Copenhagen Central Hospital Rigshospitalet"s Center for Muscle Research showed that physical exercise can boost the body"s ability to utilize insulin by 30 per cent， the newspaper reported.

This is equal tol the effect most elderly diabetics get from their insulin medication today， it said.

Researchers had a group of non-diabetic men and a group of men with type II， all more than 60 years of age， exercise on bicycles six times a week for three months. After the three months the doctors measured how much sugar the test subjects" muscles could utilize as a measure for how well their insulin worked.

Associate Professor Dr. Flemming Dela of the Muscle Research Center said the tests demonstrated that the exercising diabetics had just as high insulin utilization as the healthy non-exercising persons.

"This means that the insulin works just as well for both groups. Physical exercise cannot cure people of diabetes， but it can eliminate almost all their symptoms. At the same time it can put off the point at which they have to begin taking insulin or perhaps completely avoid insulin treatment."

Dela was quoted as saying.

Insulin is a hormone produced by the pancreas， controlling sugar in the body and used against diabetes.

Dela said that to achieve the desired effect diabetics need only exercise to the point where they begin to work up a sweat， but that the activity has to be maintained since it wears off after five days without sufficient exercise.

Most diabetics realize that they have to watch their diet while remaining unaware of the importance of exercise， Dela added.

How could most elderly type II diabetics stop taking insulin？ 查看材料

A.By taking more salt than usual.

B.By taking less salt than usual.

C.By doing brisk exercise for half an hour at least three times a week.

D.By going climbing， swimming or boxing every day.

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第4题
根据下面短文内容，回答题。 Public Relations __________

根据下面短文内容，回答题。

Public Relations

__________ 查看材料

A.matter

B.form

C.system

D.direction

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第5题
根据HH公司的财务报告（如表19－1和表19－2所示)，回答题。

根据HH公司的财务报告(如表19-1和表19-2所示)，回答题。

根据HH公司的财务报告（如表19－1和表19－2所示)，回答题。根据HH公司的财务报告(如表19-1

根据HH公司的财务报告（如表19－1和表19－2所示)，回答题。根据HH公司的财务报告(如表19-1

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第6题
根据下面资料，回答题 Morning，NoonandNight The long-hours

根据下面资料，回答题

Morning，NoonandNight The long-hours culture at work

Working an eight-hour day is a luxury for most professional people. Nowadays， the only way to guarantee an eight-hour working day is to have a kind of job where you clock on and off. Those professionals who have managed to limit their hours to what was， 20 years ago， averagely do not wish to identify themselves. "1 can quite easily achieve my work within a normal day， but I don"t like to draw attention to it，" says one sales manager. "People looked at me when I left at 5 o"clock. Now， I put paperwork in my bag. People assume I"m doing extra hours at home."

But more typical is Mark， who works as an account manager. He says， "My contract says I work from 9 until 5 with extra hours as necessary. It sounds as if the extra hours are exceptional. In fact， my job would be enough not only for me， but also for someone else part- time. The idea of an eight-hour day makes me laugh!" He says he has thought about going freelance but realizes that this doesn"t guarantee better working hours.

Professor Cary Cooper， occupational psychologist at the University of Manchester， is the author of the annual Quality of Working， Life survey. The most recent survey found that 77% of managers in Britain work more than their contracted hours， and that this is having a damaging effect for their health， relationships and productivity. Professor Cooper is critical of the long-hour culture. He says that while bosses believe long hours lead to greater efficiency， there is no evidence support this. "In fact， the evidence shows that long hours make you ill." There are， he says， steps that can be taken. One is to accept that the in-tray will never be empty. "There are always things to do. You just have to make the rule that on certain days you go home early. Prioritizing work and doing essential tasks first helps，" he says. He also thinks it"s time to criticize bad employers and unreasonable terms of employment. By all means， show commitment where necessary but when expectations are too high， people have to begin saying openly that they have a life outside of work.

Personal development coach Mo Shapiro agrees that communication is important. Staff needs to talk to managers about the working practices within a company. Both parties should feel that the expectations are realistic and allow them to have responsibilities and interests outside work. She recognizes， however， that in many organizations the response might well be， "If you want interests outside work， then find another job".

She believes that senior staff has a duty to set an example. "1 recently worked for a firm of solicitors where the partners started at 7:30 am. What kind of message is that to send to the staff？" She believes there is no shame in working sensible hours - in fact quite the reverse."Some people might be in at 7:30 but will be doing very little. You can work really hard from9 to 5 and achieve the same. If you find it difficult to achieve an eight-hour day， there is， as a last resort， the old trick of leaving your jacket on your chair and your computer switched on， even after you have left the building.

What does the writer say in the first paragraph about people who work an eight-hour day？ 查看材料

A. They are reluctant to admit to this.

B. They are disliked by their colleagues.

C. They are limited to certain professions.

D. They often catch up on work in the evenings.

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第7题
根据下面短文内容，回答题。 Teaching and Learning _____________

根据下面短文内容，回答题。

Teaching and Learning

_____________ 查看材料

A.careful

B.happy

C.familiar

D.pleased

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第8题
根据下面短文内容，回答题。 The Race into Space Dennis Tito was the first tou

根据下面短文内容，回答题。

The Race into Space

Dennis Tito was the first tourist in space. 查看材料

A.Right

B.Wrong

C.Not mentioned

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