问答题简答题：磁翻的产生及作用？

题型：单项选择题

青春期DUB的治疗原则是

A．减少月经量

B．调整周期、减少月经量

C．调整垂体与性腺功能

D．止血、调整周期、促进排卵

E．防止内膜病变

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题型：阅读理解

Jeans are very popular especially with teenagers. It’s said that the material came originally from Nimes, a city in France. These jeans were particularly created for the sailors, who loved wearing jeans very much. These jeans could be worn when wet and it could even be rolled over with ease. This was particularly useful when the sailors were busy with their everyday work.

Our favorite pair of blue, jeans was originally worn by workers particularly during World War II. Perhaps the strong and durable(耐用的) look made these blue jeans popular among all the factory workers. A strange thing that can be noticed happened in the early period of the 1950s when blue jeans worn by teens were considered to be a form of being against others. Besides, adults who wore blue jeans were not allowed to enter a movie theatre. It was only during the 1960s that blue jeans were accepted as a fashion trend in the United States of America. Movie stars wore them in films and in public. Many young people follow them.

The different looks of the regular blue jeans which are enjoyed by people were introduced by the mid 1950s. It was Donald Freeland who gave jeans a whole new look and brought it to the front. Originally, jeans were always worn loose. At first, jeans worn by men had the zipper(拉链)on the front. However, for women, it was on the side. By the late 1960's , the zipper finally was on the front side for women as well.

Today, there are many new designs that are being created by fashion designers to meet the increasing demands from jean lovers! A pair of basic blue jeans, however, is one such piece of clothing that will never go out of fashion! When you open one's cupboard, there is always one pair of jeans one likes best.

小题1:The sailors originally were interested in wearing jeans because jeans .

A．could give them a pleasant look

B．were convenient and easy to use

C．were cheaper than other trousers

D．could be washed and made easily小题2:According to the passage, blue jeans .

A．were once a sign of being against their parents

B．were popular with people of different ages in the 1950s

C．began to be poplar with American people in the 1960s

D．have been worn by the factory workers after World War II小题3:The following all lead to the popularity of jeans EXCEPT .

A．American culture

B．various designs

C．movie stars' influence

D．its cloth quality小题4:It is known from the passage that .

A．Donald Freeland gave jeans a whole new design

B．the zipper was always on the front side of all jeans

C．The jeans were introduced into America in the 1950s

D．Donald Freeland was the first to make jeans popular in the world小题5:In the last paragraph, the writer is trying to .

A．show his interest in blue jeans

B．tell us the popularity of jeans

C．praise the benefits of blue jeans

D．discuss the development of jeans

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题型：单项选择题 A3型题

一九九零年对某钢铁公司放射工作者外周血淋巴细胞微核率进行了测试。结果141例放射工作者的淋巴细胞微核率为O．0943％，正常对照组淋巴细胞微核率为0．031％，95％正常值范围为O～O．1％，放射工作者微核率虽比对照组有显著性差异，停止接触后，此种差异仍然维持一年，但处于正常值范围，是否有损害作用

磁翻的产生及作用？

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