根据《本地通信线路工程设计规范》,采用墙壁敷设方式时,其路由选择应满足下列要求:()

题型:多项选择题

问题:

根据《本地通信线路工程设计规范》,采用墙壁敷设方式时,其路由选择应满足下列要求:()

A.沿建筑物敷设应横平竖直不影响房屋建筑美观。路由选择不应妨碍建筑物的门窗启闭,电缆接头的位置不应选在门窗部位。

B.安装电缆位置的高度应尽量一致,住宅楼与办公楼以2.5m~3.5m为宜,厂房、车间外墙以3.5m~5.5m为宜。

C.应避开高压、高温、潮湿、易腐蚀和有强烈振动的地区。如无法避免,应采取保护措施。

D.应避免选择在影响住户日常生活或生产使用的地方。

考点:管道工考试本地通信线路工程设计规范本地通信线路工程设计规范题库
题型:多项选择题

竞技游泳包括的姿势:蝶泳、蛙泳、()和()。

A.仰泳

B.潜泳

C.自由泳

D.混合泳

题型:多项选择题
美国有一家工厂要制造一种特殊用途的钢铝罐.即钢罐内表面要压接一层0.25毫米厚的铝片.焊接专家、锻压专家都束手无策.后来,圣迪亚实验室的科学家解决了这一难题.他们先把薄薄的铝片装到钢罐内与内表面相贴,再往钢罐内灌满水,水中插入冷冻管,使水结冰,冷冻后铝膜就与钢罐接牢了.使铝膜与钢罐接牢的原因是(  )

A.铝膜和钢罐之间的水把它们冻牢了

B.水结冰时放热使它们焊牢了

C.水结冰时膨胀产生的巨大压力使它们压牢了

D.以上说法都不正确

题型:多项选择题

根据如图自编一道计算题并给出标准答案.[C-12Cl-35.5Ca-40O-16H-1](原来总是老师出题考我,现在我也当一回老师,并能做出标准答案^_^)

题型:多项选择题

Poor Oral Health Leads to Social and Emotional Problems

A new report says nearly four-billion people have major tooth decay, or cavities. That number represents more than half of the world's population. Health officials are warning that failure to repair cavities can lead to social and emotional problems.

Wagner Marcenes is with the Institute of Dentistry at Queen Mary, University of London. He led a team of researchers as part of the Global Burden of Disease 2010 study. About 500 researchers attempt to collect and examine studies about all major diseases. They used the information to estimate rates of the infection.

The report says untreated tooth decay is the most common of all 291 major diseases and injuries. Professor Marcenes says cavities or holes  in permanent teeth are also known as caries.

"Caries is a chronic disease that shares the same risk factors as cancer, cardiovascular disease. What we're having now is an increase in disease from highly developed countries happening in sub-Saharan Africa and probably it will be in other areas of Africa, too."

He says an increase in tooth decay in Africa could be a result of developing countries becoming more like Western nations.

"It is likely to be related to a change in diet. Our industrialized diet leads to chronic disease, which includes caries. And that may be the main explanation."

Western diets are rich in sugar, a leading cause of health problems in the mouth. Wagner Marcenes says oral health problems can have a major effect on a person's quality of life. First, cavities make eating difficult. Second, people may change what they eat. They may eat softer foods that are not hard to chew. However, softer foods are often fattier foods.

But professor Marcenes says the biggest issue in tooth decay is both social and mental. He says the researchers found strong evidence that the mouth has a big influence on socialization. He says many people want to hide bad teeth. They smile less and communicate less.

Wagner Marcenes is calling for an "urgent, organized, social response" to the widespread lack of oral health. He believes in a natural method to fight tooth decay by having a healthier diet. He is also calling for the development of new and less costly dental materials and treatments.

小题1:From the passage, we know that Wagner Marcenes ______.

A.works as the leader of the Institute of Dentistry at Queen Mary, University of London.

B.and his researchers accumulate some studies to find out some ways to cure all major disease.

C.is in charge of the activity to estimate the infection rate with the collected and examined studies about all major studies.

D.thinks that the most serious problem caused by tooth decay is cancer that will last for a long time.小题2:Caries is a disease that ______.

A.is listed in the most common of all 291 major diseases and injuries which will last for a long time..

B.is closely related to industrialized diet which calls for people to eat slowly.

C.increases in Africa now because developing countries are becoming developed countries.

D.will cause phychological disorder which will affect people’s communication.小题3:The writer wrote this passage in order to ______.

A.arouse people’s concern about caries and take measures to deal with it.

B.tell the result of the Global Burden of Disease 2010 study.

C.warn people in Africa to adjust their diet to prevent caries.

D.tell doctors that caries affects a person’s quality of life.小题4:What is the writer’s attitude towards tooth decay?

A.indifferent

B.concerned

C.angry

D.negative

题型:多项选择题

脊髓灰质炎的主要传染源是()

A.无症状病毒携带者

B.猴

C.病人

D.隐性感染者

E.猩猩

更多题库