题目内容
In 1967, in response to widespread public concern aroused by medical reports of asbestos(石棉绒) related deaths, NMRC organized a committee of enquiry to investigate the health threats ,associated with the use of asbestos in the building industry. After examining evidences provided by medical researchers and building workers and management, NMRC published a report, which included advices for dealing with asbestos. The report confirmed the findings of similar research in the U. S. and Canada. Exposure to relatively small quantities of asbestos fibers, they concluded, was directly responsible for the development of cancers, asbestosis and related diseases. Taking into account evidence provided by economists and building industry management, however, the report assumed that despite the availability of other materials, asbestos would continue to play a major role in the British building industry for many years to come because of its availability and low cost. As a result, NMRC gave a series of recommendations, which were intended to reduce the risks to those who might be exposed to asbestos in working environments. They recommended that, where possible, asbestos-free materials should be employed. In cases where asbestos was employed, it was recommended that it should be used in such a way that loose fibers were less likely to enter the air. The report recommended that special care should be taken during work in environments which contain asbestos. Workers should wear protective equipment and take special care to remove dust from the environment and clothing with the use of vacuum cleaner. The report identified five factors which determine the level of risk involved. The state and type of asbestos is critical to determining the risk factors. In addition, dust formation was found to be limited where the asbestos was used when wet rather than dry. A critical factor takes place in risk reduction is the adequate ventilation of the working environment. When work takes place in an enclosed space, more asbestos particles circulate and it was therefore recommended that natural or machine ventilation should be used. By closely following these advices, it was claimed that exposure can be reduced to a reasonably practical minimum. Evidence from the economists and the building industries shows that _________.
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Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.
In 1967, in response to widespread public concern aroused by medical reports of asbestos(石棉绒) related deaths, NMRC organized a committee of enquiry to investigate the health threats ,associated with the use of asbestos in the building industry. After examining evidences provided by medical researchers and building workers and management, NMRC published a report, which included advices for dealing with asbestos. The report confirmed the findings of similar research in the U. S. and Canada. Exposure to relatively small quantities of asbestos fibers, they concluded, was directly responsible for the development of cancers, asbestosis and related diseases. Taking into account evidence provided by economists and building industry management, however, the report assumed that despite the availability of other materials, asbestos would continue to play a major role in the British building industry for many years to come because of its availability and low cost. As a result, NMRC gave a series of recommendations, which were intended to reduce the risks to those who might be exposed to asbestos in working environments. They recommended that, where possible, asbestos-free materials should be employed. In cases where asbestos was employed, it was recommended that it should be used in such a way that loose fibers were less likely to enter the air. The report recommended that special care should be taken during work in environments which contain asbestos. Workers should wear protective equipment and take special care to remove dust from the environment and clothing with the use of vacuum cleaner. The report identified five factors which determine the level of risk involved. The state and type of asbestos is critical to determining the risk factors. In addition, dust formation was found to be limited where the asbestos was used when wet rather than dry. A critical factor takes place in risk reduction is the adequate ventilation of the working environment. When work takes place in an enclosed space, more asbestos particles circulate and it was therefore recommended that natural or machine ventilation should be used. By closely following these advices, it was claimed that exposure can be reduced to a reasonably practical minimum. Exposure to asbestos fibers can cause cancer _________.
Questions 11 to 18 are based on the conversation you have just heard.
TEXT A Like land, labor is means of production. In non-industrial societies, access to both land and labor comes through social links such as kinship, marriage, and descent. Mutual aid in production is merely one aspect of ongoing social relationships that are expressed on many other occasions. Non-industrial societies contrast with industrial nations in regard to another means of production — technology. In bands and tribes manufacturing is often linked to age and gender. Women may weave and men make pottery or vice versa. Most people of a particular age and gender share the technical knowledge associated with that age and gender. If married women customarily make baskets, most married women know how to make baskets. Neither technology nor technical knowledge is as specialized as it is in states. However, some tribal societies do promote specialization. Among the Yanomani of Benezuela and Brazil, for instance, certain villages manufacture clay pots and others make hammocks. They don’t specialize, as one might suppose, because certain raw materials happen to be available near particular village. Clay suitable for pots is widely available. Everyone knows how to make pots, but not everybody does so. Craft specialization reflects the social and political environment rather than the natural environment. Such specialization promotes trade, which is the first step in creating an alliance with enemy village. Specialization contributes to keeping the peace, although it has not prevented intervillage warfare. Among the Trobriand Islanders of the South Pacific, Malinowski found that only two out of several villages manufactured certain ceremonial items that were important in a regional exchange network called the kula ring. As among the Yanomani, this specialization was unrelated to the location of raw materials. We don’t know why this specialization began, but we do know that it persisted within the kula ring, which allied several communities and islands in a common trade network. What does the sentence "manufacturing is often linked to age and gender" mean
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