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The south and east of the Great Lakes is famous for the huge amounts of snow it receives. When the snow starts to fall every year, people start discussing the phrase “lake-effect snow”.
Lake-effect snow which is influenced by the movement of cold air over the relatively warm water of the Great Lakes often comes in late autumn and early winter. Because of the at least 20 degrees’ difference between the lake water and the overrunning air, it’s easy to form huge amounts of snow.
As the cool air crosses the water of Great Lakes, the lowest levels of the atmosphere begin to warm and pick up moisture. This newly warmed atmosphere is lighter than the cold air above it, so it starts rising. As the changed air continues to climb higher and higher, it finally meets much colder atmosphere which changes the moisture into water drops and ice, forming clouds. After this course repeats a number of times, the clouds become heavier and heavier, and then they are changed into snow and fall down.
The most important point that decides the amount of snowfall is the direction of the wind. If the wind runs perpendicularly（垂直地）across the lake, there won’t be plenty of time for clouds to develop. However, if the wind runs in the opposite direction, clouds will form easily. The longer the cold air travels over the lake, the more moisture it is able to produce, which leads to a greater amount of snow.
The largest amount of the lake-effect snow was found across the U.P. of Michigan, the northwestern Pennsylvania and the far southwestern and northwestern New York, which are all along the south or east of the Great Lakes. It has been over 100 inches of snowfall in a winter season.
1.The level of the snowfall depends on ________.
A．the size of the lake
B．the direction of the wind
C．the temperature of the lake
D．the strength of the wind
2.From the passage, we can learn that ________.
A．clouds are easy to produce with the help of the perpendicular wind
B．cold air always falls down and picks up moisture to form clouds
C．the temperature of the lake water is the same as the overrunning air’s above it
D．the longer journey of the cold atmosphere can make a grater amount of snow
3.The passage is mainly about ________.
A．the influences of the lake-effect snow for local people
B．the weight between moisture and atmosphere
C．how the phrase “lake-effect snow” comes in New York
D．how the lake-effect snow forms around the Great Lakes
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One thing the tour books don’t tell you about London is that 2,000 of its residents are foxes. They ran away from the city about centuries ago after developers and pollution moved in. But now that the environment is cleaner, the foxes have come home, one of the many wild animals that have moved into urban areas around the world.
“The number and variety of wild animals in urban areas is increasing,” says Gomer Jones, president of the National Institute for Urban Wildlife, in Columbia, Maryland. A survey of the wildlife in New York’s Central Park last year tallied the species of mammals, including muskrats, shrews and flying squirrels. A similar survey conducted in the 1890s counted only five species. One of the country’s largest populations of raccoons (浣熊) now lives in Washington D.C., and moose (驼鹿) are regularly seen wandering into Maine towns. Peregrine falcons(游隼) dive from the window ledges of buildings in the largest U.S. cities to prey on (捕食) pigeons.
Several changes have brought wild animals to the cities. Foremost is that air and water quality in many cities has improved as a result of the 1970s pollution-control efforts. Meanwhile, rural areas have been built up, leaving many animals on the edges of suburbs. In addition, urban wildlife refuges (避难处)have been created. The Greater London Council last year spent￡750,000 to buy land and build 10 permanent wildlife refuges in the city. Over 1,000 volunteers have donated money and cleared rubble from derelict lots. One evening last year a fox was seen on Westminster Bridge looking up at Big Ben.
For peregrine falcons, cities are actually safer than rural cliff dwellings (悬崖栖息地). By 1970 the birds had died out east of the Mississippi because the DDT had made their eggs too thin to support life. That year, scientist Tom Cade of Cornell University began raising the birds for release in cities, for cities afforded abundant food.
Cities can attract wild animals without turning them harmful. The trick is to create habitats where they can be self-sufficient but still be seen and appreciated. Such habitats can even be functional. In San Francisco, the local government is testing different kinds of rainwater control basins to see not only which ones retain (保持) the cleanest water but which will attract the most birds.
1.The first paragraph suggests that ________.
A. environment is crucial for wildlife
B. tour books are not always a reliable source of information
C. London is a city of fox
D. foxes are highly adaptable to environment
2.Which of the following is NOT a reason that wildlife is returning to the cities?
A. Food is plentiful in the cities.
B. Wildlife is appreciated in the cities.
C. Wildlife refuges have been built in the cities
D. Air and water quality has improved in the cities
3.The underlined word “tallied” in Para. 2 means __________.
A. distinguished B. described C. counted D. excluded
4.It can be inferred from the passage that _________.
A. Londoners are putting more and more wild animals into their zoos.
B. Londoners are happy to see wild animals return to their city
C. Londoners are trying to move wild animals back to the countryside
D. Londoners have welcomed the wild birds, but found foxes a problem
5.What is the passage mainly about?
A. Wildlife returning to large cities
B. Foxes returning to London
C. Wild animals living in zoos
D. A survey of wildlife in New York
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阅读下面短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。
After the war between Britain and France which lasted 7 years, James Cook got married and 21 down in London. For several years, Captain Cook 22 to the east of America 23 he made a map of its 24 ．In 1768 came Cook's 25 for a major expedition. The navy was 26 a plan for an expedition 27 the South Pacific Ocean in 28 of watching a very unusual 29 ， that is the planet Venus 30 between the earth and the sun in 1769. His 31 hope was to find a new land 32 was thought to be 33 in the Indian and Pacific Ocean. 34 Captain Cook was to be there in charge of this expedition 35 Captain of the ship 36 "Endeavour". It was an old merchant ship just like 37 on which Cook had learnt his seamanship. It was strongly built and had a lot of space 38 for storage. Cook understood there would be a lot of hardship for them, so he got everything 39 it. In this expedition, he had sailed around 40 and up the east coast of Australia, charting(绘制) over 8,000 miles of coastline that had been unknown before.
A. set B. sailed C. sent D. settled
A. went B. flew C. sailed D. came
A. which B. where C. that D. when
A. countries B. coasts C. cities D. seas
A. chance B. hope C. ship D. expedition
A. finding B. learning C. doing D. making
A. in B. to C. for D. at
A. the hope B. a view C. an idea D. plan
A. accident B. incident C. matter D. event
A. existing B. setting C. passing D. appearing
A. first B. second C. third D. last
A. which B. where C. what D. on which
A. passing B. going C. existing D. sailing
A. but B. as C. and D. for
A. of B. for C. like D. as
A. which called B. called C. call D. calling
A. one B. it C. the one D. what
A. down B. off C. up D. away
A. full prepared for B. fully prepared for
C. fully preparing D. full preparation
A. Endland B. Australia
C. New Zealand D. Tasmania
查看习题详情和答案>>If you visit a big city anywhere in the world,you will probably find a restaurant which serves the food of your native country.Most large 1 in the United States offer an international sample of 2 .Many people enjoy eating the food 3 other nations.This is probably one reason 4 there are so many different kinds of restaurants in the United States.A second is that Americans 5 from all the parts of the world.They enjoy tasting the foods of their 6 lands.
In the city of Detroit, 7 ,there are many people from Western Europe,Latin America 8 the Far East.There are many restaurants in Detroit 9 serve the foods of these areas.There are many
10 international restaurants,too.Americans not only like the foods in these restaurants but also enjoy the chance to 11 understand the foreign people and their 12 of life.
One of 13 most common international restaurants to be 14 in the US is an Italian restaurant.The restaurant is a small business 15 by a single family.The mother of the 16
cooks all the dishes and the 17 and children serve the customers who come to eat there.Or it may be a 18 restaurant which can 19 many customers during one evening.So a restaurant may be owned 20 one family,one person,or by several different people who work together in the business.
1.A.cities B.countryside C.nations D.families
2.A.waiters B.restaurants C.foods D.cooks
3.A.about B.of C.on D.with
4.A.as B.when C.which D.why
5.A.arrive B.come C.go D.leave
6.A.garden B.country C.state D.native
7.A.as B.like C.for example D.such as
8.A.and B.with C.of D.then
9.A.where B.which C.when D.why
10.A.other B.others C.another D.other’s
11.A.worse B.better C.hardly D.more
12.A.hope B.wish C.place D.way
13.A.the B.a C.this D.that
14.A.cooked B.enjoyed C.found D.eaten
15.A.built B.run C.driven D.lived
16.A.family B.city C.business D.restaurant
17.A.mother B.guests C.visitors D.father
18.A.small B.large C.tiny D.bad
19.A.deal B.work C.serve D.prepare
20.A.by B.with C.of D.for
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