阅读理解

　　Tokyo: Three snakes, whose poison could kill a person in ten minutes, are guarding a blue star sapphire (蓝宝石)worth nearly six hundred thousand dollars at a Japanese exhibition of jewels sent from an Indian museum.

　　“Normally it would be forbidden to let these poisonous snakes guard exhibiton objects, but it's different this time because the jewels are being exhibited at a hotel. ”a police official said.

　　Exhibition officials said that a person bitten (咬)by one of these snakes would need at least 80m1 of an anti-poison medicine to be saved. Medicine was being kept ready at a nearby hospital.

　　The star sapphire and other valuable jewels worth a total of one million dollars are on show behind glass. Hundreds of visitors came to see the special blue star sapphire and were surprised when they saw the sixty-centimetre-long brown guards.

1．Using snakes at exhibitions of valuable objects is ________.

[　　]

A．quite normal

B．never allowed

C．often necessary

D．usually forbidden

2．The jewels were being shown in ________.

[　　]

A．an Indian hotel

B．an Indian museum

C．a Japanese hotel

D．a Japanese museum

3．Why were the snakes and jewels at the same exhibition?

[　　]

A．They were both special things from India.

B．The snakes were to keep the jewels safe.

C．The organizers wanted to do something unusual.

D．People liked to visit an exhibition guarded by snakes.

4．Many visitors came to the exhibition because ________.

[　　]

A．the snakes were on show

B．so many jewels were being exhibited

C．exhibition officials said it was special

D．they were interested in seeing a famous jewel

5．If the visitors were bitten by one of the poisonous snakes, he ________.

[　　]

A．would be saved by anti-poison medicine

B．would be dying soon

C．would feel nothing serious

D．would run away as soon as possible

　
E　　
As a result of pollution , Lake Erie , on the borders of the USA and Canada, is now without any living things.　　
Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organism(生物体 ) to be affected are either plants or plankton. But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it is not until dead fish and water birds are seen at the river’s edge or on the sea shore that people realize what is happening.　　
Where do the substances which pollute the water come form? There are two main sources sewage (污水) and industrial waste. As more detergent (洗涤剂 ) is used in the home, so more of it is finally put into our rivers. lakes and seas. Detergents harm water birds dissolving the natural substances which keep their feathers waterproof. Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful since there are many highly poisonous things in it, such as copper and lead(铅 ).　　
So , if we want or stop this pollution , the answer is simple: sewage and industrial waste must be made clean before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.　　
72. Pollution in water is noticed _____. 　　
A. when the first organisms are affected    B. when a good many fish and birds die 　　
C. when poisonous things are poured into water      　　
D. as soon as the balance of nature is destroyed 　　
73. The living things die because there is no ____ in the lake or river.  　　
A. water          B. fish               C. poison           D. oxygen 　　
74. Which of the following is harmful according to the passage? 　　
A. Organisms                             B. Plants and plankton in the water     　　
C. Waste water from cleaning   D. Industrial waste made clear before flowing into the water 　　
75.The way to stop water pollution is _______.　　
A. realize the serious situation clearly 　　
B. put oxygen into the river 　　
C. make the waste material harmless before flowing into the water 　　
D. make special room in the sea for our rubbish　　

A friend is better than fortune. A friend is worse than poison in some cases. 

The two sentences above have opposite meanings and seem to be unreasonable, but they can be explained as follows: the first refers to all good friends who drive us towards good while the second all bad ones who lead us into bad ways.

　　My ideal friend is of course a good friend whose goodness is shown below — he has no bad habits, such as smoking and drinking. He lives in frugality (节俭). He studies hard so as not to waste his golden time. At home he honors his parents and loves his brothers; at school he respects his teachers and shares the feelings of his classmates. He treats those truly who are true to him. In a word, he has all the good characteristics that I don’t have. I can follow him as a model. With his help I can be free from all difficulties.

Indeed, if I have such a person as my friend, I shall never fear difficulty and I shall never know the existence of the word “failure”.

1.This passage tells us ____.

　  A. how to make friends with others         B. how to help friends

　  C. what kind of person the writer’s friend is

　  D. what kind of person we should make friends with

2.According to the writer, an ideal friend refers to _______. 

　  A. a friend without bad habits           　B. a famous man

　  C. a perfect man                       D. a respectable man

3.From the passage we can learn that ________. 

　  A. the writer and his ideal friend have a lot to learn from each other

　  B. the writer has a lot to learn from his ideal friend

　  C. the writer’s ideal friend has a lot to learn from him

　  D. the writer has only a little to learn from his ideal friend

4.From the second paragraph, we can infer the writer is sure that _______. 

　  A. friendship means a great deal to him

　  B. nothing can be done without friends

　  C. he who does not smoke or drink must be a good friend

D. good friends should always help each other

　　Even plant can run a fever, especially when they’re under attack by insects or disease. But unlike human, plants can have their temperature taken from 3, 000 feet away - straight up. A decade ago, adopting the infrared （红外线）scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide （杀虫剂）spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest （害虫）problems.

　　Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3, 000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color - coded map showing where plants were running“ fevers”. Farmers could then spot - spray, using 50 to 70 percent less pesticide than they otherwise would.

　　The bad news is that Paley’s company closed down in 1984, after only three years. Farmers resisted the new technology and long - term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. “This technique can be used on 75 percent of agricultural land in the United States, ” says George Oerther of Texas A & M. Ray Jackson , who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only ff Paley finds the financial backing which he failed to obtain 10 years ago.

　56．Plants will emit an increased amount of heat when they are________.

　　A. sprayed with pesticides     B. facing an infrared scanner

　　C. in poor physical condition   D. exposed to excessive sun rays

　57．In order to apply pesticide spraying precisely, we can use infrared scanning to________.

　　A. estimate the damage to the crops    B. measure the size of the affected area

　　C. draw a color -coded map          D. locate the problem area

　58．Farmers can save a considerable amount of pesticide by________.

　　A. resorting to spot – spraying   B. consulting infrared scanning experts

　　C. transforming poisoned rain    D. detecting crop problems at an early stage

　59．The application of infrared scanning technology to agriculture met with some difficulties________.,

　　A. the lack of official support        B. its high cost

　　C. the lack of financial support      D. its failure to help increase production

　60．Infrared scanning technology may be brought back into operation because of________.

　　A. the desire of farmers to improve the quality of their produce

　　B. growing concern about the excessive use of pesticides on crops

　　C. the forceful promotion by the Department of Agriculture

　　D. full support from agricultural experts