There are two types of strain we studied, which include and .

Snow Ranger

The two things—snow and mountains—which are needed for a ski area, are the two things that cause avalanches, large mass of snow and ice crushing down the side of a mountain—often called White Death.

It was the threat of the avalanche and its record as a killer of man in the western mountains that created the snow ranger. He first started on avalanche control work in the winter of 1937 at Alta, Utah, in Wasatch National Forest.

This mountain valley was becoming well known to skiers. It. was dangerous. In fact, more than 120 persons had lost their lives in 1936 and another 200 died in 1937 as a result of avalanches before it became a major ski area.

Thus, development of Alta and other major ski resorts in the west was dependent upon controlling the avalanche. The Forest Service set out to do it, and did, with its corps of snow rangers.

It takes many things to make a snow ranger. The snow ranger must be in excellent physical condition. He must be a good skier and a skilled mountain climber. He should have at least a high school education, and the more college courses in geology, physics, and related fields he has, the better.

He studies snow, terrain, wind, and weather. He learns the conditions that produce avalanches. He learns to forecast avalanches and to bring them roaring on down the mountainsides to reduce their killing strength. The snow ranger learns to do this by using artillery, by blasting with TNT, and by the difficult and skillful art of skiing avalanches down.

The snow ranger, dressed in a green parka which has a bright yellow shoulder patch, means safety for people on ski slopes. He pulls the trigger on a 75 mm. Recoilless rifle, skis waist deep in powder testing snow stability, or talks with the ski area's operator as he goes about his work to protect the public from the hazards of deep snow on steep mountain slopes.

The snow rangers are employees of ______.

A．the Forest Service

B．the Resource Bureau

C．the Tourist Board

D．the Sports Bureau

One of the features of London is the number of big stores, most of which are to be found in or near the West End. They are vast buildings, many stories【51】; in them one may buy almost anything one wants,【52】a box of matches to a suite of furniture. Most of【53】are very modern and are equipped with speedy lifts and escalators, and have well-planned lighting,【54】and heating. You can spend hours wandering【55】one of these stores, and you will probably lose your【56】while you are doing so, in spite of the public notices pointing the way【57】the lifts and entrances.【58】you have been in the store so long【59】you feel hungry, you will【60】need to leave the building, for nearly all the big stores have cafés, snack【61】or restaurants. You can ring up a friend from a telephone-box and you may【62】at the theater agency to book a seat【63】an evening show; or you may drop【64】a travel department and arrange for a【65】in Wales or Western Australia. If you【66】homesick, you will be able to get a newspaper or magazine【67】your own country at the newspaper counter; and in book department you will【68】able to buy the complete【69】of William Shakespeare and the latest thriller. You can inspect the goods on sale【70】your leisure, and you will not be pestered to buy, though occasionally an assistant may ask whether he can be of help to you.

(51)

Snow Ranger

The two things — snow and mountains — which are' needed for a ski area are the two things that cause avalanches, large mass of snow and ice crashing' down the side of a mountain — often called "White Death."

It was file threat of the avalanche and its record as a killer of man in the western mountains that created the snow ranger. He first started on avalanche control work in the winter of 1937 — 1938 at Alta, Utah, in Wasatch National Forest.

This mountain valley was becoming well known to skiers. It was dangerous. In fact, more than 120 persons had lost their lives in 1936 and another 200 died in 1937 as a result of avalanches before it became a major ski area.

Thus, development of Alta and other major ski resorts in the west was dependent upon

controlling the avalanche. The Forest Service set out to do it, and did, with its corps of snow rangers.

It takes many things to make a snow ranger. The snow ranger must be in excellent physical condition. He must be a good skier and a skilled mountain climber. He should have at least a high school education, and the more college courses in geology, physics, and related fields he has, the better.

He studies snow, terrain, wind, and weather. He learns the conditions that produce avalanches. He learns to forecast avalanches and to bring them roaring on down the mountainsides to reduce their killing strength. The snow ranger learns to do this by using artillery, by blasting with TNT, and by the difficult and skillful art of skiing avalanches down.

The snow ranger, dressed in a green parka which has a bright yellow shoulder patch, means safety for people on ski slopes. He pulls the trigger on a 75 mm. Recoilless rifle, skis waist deep in powder testing snow stability, or talks with the ski area's operator as he goes about his work to protect the public from the hazards of deep snow on steep mountain slopes.

The snow rangers are employees of ______.

A．the Forest Service

B．the Resource Bureau

C．the Tourist Board

D．the Sports Bureau

听力原文：W: So Mr. Brown, this is your bed, and as you can see, there are three other beds in the ward. Have you got everything you need?

M: Yes, nurse, I think so. I followed the hospital's advice, and I've only brought a few belongings with me.

W: Good, you can see the reasons why we ask you to do that, the cupboard is really very small.

M: Yes. Nurse, can you tell me what the visiting hours are?

W: Yes, of course. They are in the afternoon from 2:30 to 4:30 and in the evening from 7:00 to 8:00, but remember that only two people can see you at the same time.

M: I see. What other rules are there?

W: Yes. We start pretty early. We wake you at 6 o'clock, and breakfast is at 8 o'clock, lunch is at noon, there is tea at 3:30, and supper is at 6 o'clock.

M: Oh, that's very different from what I have been used to. You'd better tell me the rest of the rules here.

W: Yes. Well, you can see the no smoking sign. We don't allow smoking in the wards, and the same goes for alcohol. However, if you do need to smoke, there are special lounges.

M: Oh, I don't smoke, so it doesn't affect me.

W: Good.

Mr. Brown brought with him only a few things because ______ .

A．there wasn't enough space in the cupboard

B．the hospital would provide him with everything

C．he was to stay there for a very short time

D．visitors could bring him other things

American Museum of Natural History is one of the largest natural and historic museums in the world and one of the main natural history research and education centres in the United States, set up in 1869 and located in the west of the Central Park, Manhattan District, New York. It【1】7 hectares in its total area,【2】classical types of buildings. The【3】of ancient creatures and humanity is【4】the first place of all the museums in the world,【5】the representative samples from South America, Africa, Europe, Asia and Australia were collected, besides those from the【6】country, the United States.

In the museum, there are five kinds of exhibits, including astronomy, mineralogy, human history, and animals in the【7】times and those in modern times. There are thirty-eight exhibition halls with different【8】from 500 to 1,500 square metres. Besides these, there is a Roosevelt Memorial Hall in【9】of President Roosevelt who supported the【10】of the museum, which is also used to have a special exhibition, showing the new important【11】on natural sciences and【12】affairs and social problems, and special topics connected closely with the life of the citizens. Besides this, it is also used for avocation【13】to have all kinds of scientific activities in the laboratories, centres of natural science and centres for citizens. There are more than 10【14】research departments mainly 【15】 for collection of samples, research and work of publication.

In the museum, there are【16】 and sub-libraries of Aulspond ancient amniote, with about 300 thousand books and magazines【17】natural history, many of 【18】 are very valuable monographs for the first edition. It has published many expert books and magazines, and a large number of propaganda materials,【19】which are the two magazines, Natural History and Members of Museum that have the biggest【20】of their magazines.

(1)

A．explores

B．demonstrates

C．expands

D．covers