题目内容
They produced two reports, ________ of which contained any useful suggestions．
either
all
none
neither
Damage to Ozone Layer Gets Worse
In the middle of winter, when snow is falling in many parts of the United States, scientists have sounded a warning to people who plan to spend many hours in the sun this summer．The warning: The sun's summertime rays are more dangerous than once thought.
A team of scientists from 80 nations recently reported
to the United Nations that a layer of ozone（臭氧层）in the atmosphere, which protects humans from harmful levels of ultraviolet（紫外线）radiation, will be thinner over the United States this summer．The thinner layer allows more ultraviolet rays from the sun to reach Earth．The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer.
Scientists first became concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter．The hole was caused in chemicals used in refrigerators and air conditioners．When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone.
Concern about the protective ozone layer rose more recently when data from satellites and ground stations showed that ozone levels were dropping over areas other than Antarctica．Low ozone levels were recorded in the spring and summer over the United States and over other populated areas in the world.
Although many countries have already begun stopping the use of ozone-destroying chemicals, the new findings are expected to advance the timetable for a total ban of the chemicals.
【小题1】The scientists have observed the ozone layer ______．
| A．since 1980 | B．since last winter |
| C．for more than 20 years | D．for about one year |
| A．do a lot of good to human beings in many ways |
| B．protect humans from diseases caused by bad weather |
| C．do a lot of harm to human beings in the summer-time |
| D．protect humans from harmful levels of ultraviolet radiation |
| A．above Arctic during the winter in the mid-1980s |
| B．above Antarctica during the winter in the mid-1980s |
| C．over somewhere in the north of the equator in 1980 |
| D．over the USA in the summertime in the mid-1980s |
| A．the changeable weather | B．ozone-destroying chemicals |
| C．chemicals from refrigerators | D．chemicals from air conditioners |
“In only six days I lost seven pounds of weight.”
“Two full inches in the first three days！”
These are the kinds of statements used in magazine，newspaper，radio and television ads，promising new shapes and new looks to those who buy the medicine or the device. The promoters of products say they can shape the legs，slim the face，smooth wrinkles，or in some other way to add to beauty or desirability.
Often such products are nothing more than moneymaking things for their promoters. The results they produce are questionable，and some are dangerous to health.
To understand how these products can be legally promoted to the public，it is necessary to understand something of the laws covering their regulation. If the product is a drug，FDA(Food and Drug Administration)can require proof under the Food，Drug，and Cosmetic Act that is safe and effective before it is put on the market. But if the product is a device，FDA has no authority to require premarketing proof of safety or effectiveness. If a product already on the market is a danger to health，FDA can request the producer or distributor to remove it from the market voluntarily， or it can take legal action，including seizure(查封)of the product.
One notable case a few years ago involved an electrical device called the Relaxacisor，which had been sold for reducing the waistline (腰围). The Relaxacisor produced electrical shocks to the body through contact pads. FDA took legal action against the distributor to stop the sale of the device on the grounds that it was dangerous to health and life.
Obviously，most of the devices on the market have never been the subject of court proceedings(法律诉讼)，and new devices appear continually. Before buying，it is up to the consumer to judge the safety or effectiveness of such items.
【小题1】It can be inferred that the ads mentioned in the text are________.
| A．objective | B．costly | C．unreliable | D．illegal |
A．The court is in charge of removing dangerous products.
B．New products are more likely to be questionable.
C．The production of a device must be approved by FDA.
D．The promoters usually just care about profits.
【小题3】FDA can ask for the proof of safety and effectiveness of a product________.
| A．if it is a drug |
| B．if it is a device |
| C．if its consumers make complaints |
| D．if its distributors challenge FDA's authority |
| A．a product which was designed to produce electricity |
| B．a product whose distributor was involved in a legal case |
| C．a successful advertisement of a beauty product |
| D．an example of a quality beauty product |
| A．make consumers aware of the promoters' false promises |
| B．show the weakness of the law on product safety |
| C．give advice on how to keep young and beautiful |
| D．introduce the organization of FDA |
“In only six days I lost seven pounds of weight.”
“Two full inches in the first three days!”
These are the kinds of statements used in magazine，newspaper, radio and television ads, promising new shapes and new looks to those who buy the medicine or the device. The promoters of products say they can shape the legs, slim the face, smooth wrinkles, or in some other way to add to beauty or desirability.
Often such products are nothing more than money-making things for their promoters. The results they produce are questionable, and some are dangerous to health.
To understand how these products can be legally promoted to the public, it is necessary to understand something of the laws covering their regulation. If the product is a drug, FDA(Food and Drug Administration)can require proof under the Food, Drug, and Cosmetic Act that is safe and effective before it is put on the market. But if the product is a device, FDA has no authority to require premarketing proof of safety or effectiveness. If a product already on the market is a danger to health, FDA can request the producer or distributor to remove it from the market voluntarily, or it can take legal action, including seizure(查封)of the product.
One notable case a few years ago involved an electrical device called the Relaxacisor, which had been sold for reducing the waistline. The Relaxacisor produced electrical shocks to the body through contact pads. FDA took legal action against the distributor to stop the sale of the device on the grounds that it was dangerous to health and life.
Obviously, most of the devices on the market have never been the subject of court proceedings(法律诉讼)，and new devices appear continually. Before buying, it is up to the consumer to judge the safety or effectiveness of such items.
1.It can be inferred that the ads mentioned in the text are . .
|
A．objective |
B．costly |
C．unreliable |
D．illegal |
2.Which of the following is TRUE according to the text?
A. The court is in charge of removing dangerous products.
B. New products are more likely to be questionable.
C. The production of a device must be approved by FDA.
D. The promoters usually just care about profits.
3.FDA can ask for the proof of safety and effectiveness of a product
|
A．if it is a drug |
|
B．if it is a device |
|
C．if its consumers make complaints |
|
D．if its distributors challenge FDA’s authority |
4.The Relaxacisor is mentioned as .
|
A．a product which was designed to produce electricity |
|
B．a product whose distributor was involved in a legal case |
|
C．a successful advertisement of a beauty product |
|
D．an example of a quality beauty product |
5.The author intends to
|
A．make consumers aware of the promoters’ false promises |
|
B．show the weakness of the law on product safety |
|
C．give advice on how to keep young and beautiful |
|
D．introduce the organization of FDA |