更多"Researchers have recently found a c"的相关试题:
[单项选择] Researchers have recently found a connection between diseases and stressful situations. To test this theory, psychologists are trying to find a link between the brain and the immune system.
Our bodies are likely to get various diseases and it depends on how well our immune system works. Biologists used to think that the immune system was a separate, independent part of our bodies. Recently, however, they have found that our brain can affect our immune system. This discovery indicates that there may be a connection between emotional factors, such as stress or depression, and illness.
Although many doctors in the past suspected a connection between emotional factor and disease, they had no proof. Scientists have only recently discovered how the brain and the immune system function. Before this, no one could see a link between them. As a result, medical science never seriously considered the idea that psychological factors could cause disease.
Several recent
A. life in the school was very stressful
B. disease could be caused by psychological factors
C. the good students were likely to fall ill
D. stress often made students unhappy
[填空题]Recently, researchers have found that it is something in our brain that causes our anxiety.
[简答题]Question 4
·Recently your payments have always been delayed by your customers. The Financial Director of the company you work for has asked you to write a proposal suggesting ways to ensure timely payment of your sales.
·Write your proposal for the financial director, including the following information:
·a brief description of the present situation
·masons of delaying payment by customers
·measures to ensure timely payment
·any disadvantages there might be.
[填空题]Oysters are found to have a persistent rhythm.
[简答题]· Recently you have become unhappy with a service that has been provided to your company for a number of years. You have decided to write a letter of complaint to the service provider.
· Write your letter to the company that provides the service, including the following information:
· which service you are complaining about
· why you are dissatisfied with the service
· what action you want the service provider to take
· what you will do if there is no improvement in the service.
[简答题]Recently all sales clerks have been awarded other than John.
_________________________.
[填空题]______ (这名运动员被剥夺掉金牌) because he was found to have taken forbidden drugs.
[单项选择]Recently a number of cases have been reported of young children ______ a violent act previously seen on television.
A. modifying
B. duplicating
C. accelerating
D. stimulating
[单项选择]Two techniques have recently been developed to simplify research and reduce the number of nonhuman primates needed in studies of certain complex hormonal reactions. One technique involves the culturing of primate pituitary (垂体) cells and the cells of certain human tumors. In the other, animal oviduct (输卵管) tissue is transplanted under the skin of laboratory primates. Both culturing techniques complement existing methods of studying intact (完整的) animals.
With an in vitro culturing technique, researchers are deciphering how biochemical agents regulate the secretion of prolactin (催乳激素), the pituitary hormone that promotes milk production. The cultured cells survive for as long as a month, and they do not require serum (血清), a commonly used culture ingredient that can influence cellular function and confound study results. One primate pituitary gland may yield enough cells for as many as 72 culture dishes, which otherwise would require as many animals.
The other technique allows
A. it avoids the need for subjecting a laboratory subject to repeated major surgery
B. it permits scientists to monitor changes frequently
C. the transplanted cells grow as they would in their normal site
D. the transplanted cells can be easily grown in vitro
