题目内容
— I wonder if you have a small black suitcase of mine.
B. Who's that
C. What's that
D. How do you do
轻松暑假总复习系列答案The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage seems strange to someone fortunate enough to live in a high rainfall country, many of the world’s agricultur
al industries experience constant water shortages.
Although dams can be built to store water for agricultural use in dry areas and dry seasons, the costs of water redistribution (重新分配) are very high. Not only is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water may flow easily through pipes to fields, but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.
This is particularly troubling for countries with agricultural industries in areas dependent on irrigation. In Texas, farmers’ overuse of irrigation water has resulted in a 25% reduction of the water stores. In the Central Valley area of southwestern USA, a huge water engineering project provided water for farming in dry valleys, but much of the water use has been poorly managed.
Saudi Arabia’s attempts to grow wheat in desert areas have seen the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.
【小题1】.
. From t
he first two paragraphs we learn that __________.
| A．much of the world’s water is available for use |
| B．people in high rainfall countries feel lucky |
| C．water can be easily carried through pipes across the world |
| D．the costs of water redistribution should be considered |
. Which of the following is true?
| A．The underground water in Saudi Arabia might run out in 50 years. |
| B．Most industries in the world suffer from water shortages. |
C．The  water stores in Texas have been reduced by 75%. |
| D．Good management of water use resulted from the project in the Central Valley. |
The text is mainly about __________.
| A．water supply and increasing population |
| B．water redistribution and wildlife protection |
| C．water use management and agriculture |
| D．water shortages and environmental protection |
. What is most likely to be discussed in the paragraph that follows?
| A．Approaches to handling the pressure on water supply. |
| B．Ways to reduce the costs of building dams. |
| C．Measures to deal with worldwide water shortages. |
| D．Steps to improving water use management. |
Alzheimer’s disease is a major national health problem. Nearly 2 million Americans over the age of 65 have Alzheimer’s disease. It is a leading cause of death among the elderly. But Alzheimer’s disease is not confined （限于） to the aged. There may be a million or more people under the age of 65 suffering from the disease.
At one time, people suffering from the disease were said to be “getting old”. The disease was thought to be a natural part of growing old, but it is now known that Alzheimer’s disease strikes young and old alike. It is an organic （器官的） disease that destroys brain cells.
Alzheimer’s disease affects the patient’s memory, speech, and movement. In the beginning stages of the disease, the patient may seem slightly confused. He may have trouble speaking, then the patient’s memory begins to fail. He may forget dates, numbers, names and plans.
As the disease progresses, the patient may not recognize family and friends. These symptoms（症状） often cause terrible anxiety in the patient. He may feel lost and frightened. Sometimes the patient reacts with wild and bad behavior.
In the last stages of the disease, the patient may not be able to take care of himself. He may have lost the ability to speak and walk.
Scientists don’t know exactly what causes Alzheimer’s disease. It may be caused by a virus （病毒）.It may be caused by a poisonous substance（物质） in the environment. At present, there is no cure for the disease. But there are ways to slow its progress. Exercise and physical treatment can help the patients of this disease.
1.The main idea of the passage is that Alzheimer’s disease ________.
|
A．is a terrible part of the aging process |
|
B．is an organic disease that affects young and old |
|
C．can be cured by physical treatment |
|
D．causes forgetfulness |
2.All of the following are symptoms of Alzheimer’s disease EXCEPT________.
|
A．forgetfulness |
B．difficulty in speaking |
|
C．loss of sight |
D．loss of the ability to walk |
3.According to the passage, which of the following may be a cause of Alzheimer’s disease?
|
A．Poisons produced by the brain. |
B．Getting old. |
|
C．A virus. |
D．Lack of exercise. |
4. The press of Alzheimer’s disease can be slowed by________.
|
A．operation |
B．a change in environment |
|
C．medicines |
D．physical treatment and exercise |