题目内容
________ of land in that district ________ covered with trees and grass.
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解析：
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导解：two fifths of修饰的是不可数名词，故用单数动词． |
口算能手系列答案
Death Valley, one of America’s great national parks, is a place of strange and silent beauty. As beautiful as this place is, its name provides evidence of very real danger. Death Valley is a land of beautiful yet dangerous extremes. There are mountains that reach more than 3,000 meters into the sky. There is a place called Badwater that is the lowest area of land in the Western Hemisphere. If there were water there, it would be 86 meters below the level of the ocean.
Death Valley can be dangerously cold during the winter months. Storms in the mountains can produce sudden flooding on the floor of the Valley. The air temperature during the summer has been as high as 57℃. The sun can heat the ground so that the temperature of the rocks and soil can be as high as 74℃. The extreme heat of Death Valley has killed people in the past. It will continue to kill those who do not honor this extreme climate. Death Valley does not forgive those who are not careful.
Death Valley is a good example of the violence of nature. It contains evidence of several ancient volcanoes that caused huge explosions. Evidence of one of these explosions is called Ubehebe Crater. The explosion left a huge hole in the ground almost a kilometer and a half wide.
In many areas of Death Valley it is easy to see where the ground has been pushed up violently by movement deep in the Earth. This movement has created unusual and beautiful rock formations. Some are red. Others are dark brown, gray, yellow or black. Other areas of rock look as if some huge creature violently broke and twisted the Earth to create unusual, sometimes frightening shapes.
In other parts of Death Valley there are lines in the rock that show clearly that this area was deep under an ocean for many thousands of years. Much of the Valley is flat and extremely dry. In fact, scientists believe it is the driest place in the United States.
Death Valley, part of the Great Mojave Desert, is a huge place. It extends more than 225 kilometers across the southern part of California, and across the border with Nevada.
【小题1】Which of the following statements is TRUE according to the passage?
| A．The water in Badwater is 86 meters below the level of the ocean. |
| B．The highest air temperature in summer can reach as high as 74℃. |
| C．The ground has been pushed up violently by explosions of volcanoes. |
| D．There might have been marine lives living in Death Valley. |
| A．Because they didn’t respect Death Valley and thus they were punished. |
| B．Because it is extremely hot in summer and dangerously cold in winter. |
| C．Because they were not careful enough to take with them what they needed. |
| D．Because several volcanoes erupted and caused huge explosions. |
| A．bent and turned | B．created and developed |
| C．built and shaped | D．changed and ruined |
| A．encourage people to visit Death Valley, a beautiful national park in America |
| B．warn people not to visit Death Valley because it is quite dangerous there |
| C．introduce to us readers a special national park in America, Death Valley |
| D．raise money for the protection of Death Valley because it is in danger now |
Lee Ann Laraway has polio (小儿麻痹症) and is not able to move very much. Most things are out of reach for her. Jeannie, a Labrador retriever, acts as her arms and legs. Jeannie understands 72 or more different commands. On a shopping trip, she can get money for Lee Ann at the bank or candies at the store. She can pay the cashier (收银员) and get change back. Jeannie brings things to Lee Ann and puts them in her lap.
Jeannie was trained at a place called Canine Companions for Independence, located on twelve acres of land in Santa Rosa (California). The land was donated (捐赠) by the cartoonist Charles Shultz. “We train four different types of dogs here,” said Ken Kirsh, a dog trainer there. “Hearing dogs, service dogs, skilled companion dogs, and facility dogs.”
Trainers work with Labrador retrievers and golden retrievers for hours a day, but not every dog is good enough to be a working dog.
The work is a serious business. Hearing dogs warn their owners of sounds like ringing telephones and doorbells. Other dogs work with disabled patients like eight-year-old Noah Habib who communicates with a special computer. He likes it when people come to ask him about his dog. His father says, “People are really interested in the dog and will come over and ask to pet her and play with her, and ask about what she does, and these are people that normally might not approach us and want to talk to Noah.”
When Lee Ann Laraway comes home with Jeannie and her goods, Jeannie helps her open the door. “You can train a dog to do a lot of things.” said Lee Ann.
【小题1】According to this passage, we can know that Jeannie is Lee Ann’s .
| A．servant | B．daughter | C．dog | D．mother |
| A．go to the bank to get money |
| B．pay for what Lee Ann buys in the shop |
| C．bring things home |
| D．do some cooking at home |
| A．he is good at training dogs |
| B．he is not only honest but also lovely |
| C．they want to play with his dog |
| D．they want to ask him for help |
| A．Dogs are helpful to people | B．Four kinds of dogs |
| C．Jeannie, a very clever dog | D．How to train working dogs |
| A．Dogs that warn their owners of sounds like doorbells. |
| B．Dogs that help their blind owners cross over a road. |
| C．Dogs that open the door for their owners. |
| D．Dogs that work with children who have polio. |
Dickson Despommier, a public health professor at Columbia University in New York City developed an idea with his students nine years ago. They imagined people in cities growing crops inside a tall building. Tomatoes could grow on one floor of the skyscraper(摩天大楼), potatoes on the next, small animals and fish on the floor above.
This vertical(垂直的) farm, or "farmscraper", could have space for restaurants and other places that serve food, like schools or hospitals. They could serve foods that are truly locally grown.
But why would anyone want to build a farm indoors in a city? Dickson Despommier believes it will become necessary. The world needs to find places to produce enough food to feed the growing population. Space, he says, is an all-important issue.
The professor also points to the problems of traditional farms. They use a lot of freshwater. Their fertilizer and animal waste can pollute water resources. And their growing seasons can be limited.
But inside the vertical farm, crops could grow all year. And there would be no wind to blow away soil. Farmers would not have to worry about too much or too little rain, or about hot summers, freezing winters or insects. And without insects there would be no need for chemicals to kill them.
Farm machines that .use fossil fuels, like tractors, would not be needed either. And water could be recycled for drinking. "The vertical farm reuses everything, so there is no waste," says Professor Despommier.
Even buildings could be saved. Old buildings could become new farms and provide jobs.
The professor has been actively proposing the idea to cities as far away as Dubai and Canada. But so far it exists only in plans and drawings, and a model at the Museum of Science and Industry in Chicago.
Critics say building a farmscraper would cost too much, especially considering the price of land in many cities. Dickson Despommier estimates the cost at about twenty to thirty million dollars.
But he says the building would not have to be very tall. And his graduate students have found many empty lots and unused buildings in New York City that could provide space.
【小题1】According to the passage the purpose of proposing the idea of a farm scraper is to .
| A．find places to produce enough food |
| B．serve food that are truly locally grown |
| C．prevent polluting the limited land |
| D．save fresh water |
| A．It costs less |
| B．It saves labor power. |
| C．It consumes too much energy |
| D．It is more environmentally friendly. |
| A．it uses too much land in cities |
| B．it costs too much to build one |
| C．it causes people to lose their jobs |
| D．it exists only in unrealistic plans |
| A．A vertical farm has been built in Chicago. |
| B．Old buildings could be changed into new farms. |
| C．Traditional farms use less water but pollute more water |
| D．There are some vertical farms being put into use in Canada. |