病毒性肝炎时,肝细胞损伤取决于()A.T细胞介导的细胞免疫反应 B.免疫复合物介导的

题型:多项选择题

问题:

病毒性肝炎时,肝细胞损伤取决于()

A.T细胞介导的细胞免疫反应

B.免疫复合物介导的超敏反应

C.迟发性免疫反应

D.病毒的直接损伤

E.机体免疫反应的强弱

考点:消化内科学(医学高级)急慢性肝炎急慢性肝炎题库
题型:多项选择题

对于操作技能和心智技能的区别,表述不正确的是( )

A.操作技能的对象是具体的物质实体,心智技能的对象是观念性的

B.操作技能的执行过程是外显的,心智技能的执行是内潜性的

C.操作技能的动作可以合并,心智技能的动作则不能合并

D.操作技能的动作不能合并,必须切实执行,心智技能的动作可以合并

题型:多项选择题

甲出具一张本票给乙,乙将该本票背书转让给丙,丁作为乙的保证人在票据上签章。丙又将该本票背书转让给戊,戊作为持票人未按规定期限向出票人提示本票。根据《票据法》的规定,下列选项中,戊不得行使追索权的是( )。

A.甲

B.乙

C.丙

D.丁

题型:多项选择题

阅读理解。

     Putting in water fountains (饮水器) at schools, and teaching children about the health

benefits of water, could reduce their risk of getting extra pounds, reports a new study that

is published in the latest issue of the journal Pediatrics.

      The findings are based on a survey in 32 elementary schools of two German cities, Dortmund

and Essen. The researchers, led by Rebecca Muckelbauer, a nutritionist(营养学家) at the

Research Institute of Child Nutrition Dortmund, weighed about 3,000 children, and asked

them about their beverage consumption(饮料消费量). 

     At the beginning of the school year, the experts had water fountains added to 17 of the schools.

The scientists also worked with teachers to carry out educational programs that promote the

benefits of drinking water. In contrast to schools in the United States, there are very few

schools in Germany that have water fountains.

     At the beginning of the study, there were no big differences in the number of overweight children

in the different groups. But by the end of the school year, children in the schools with water

fountains were 31 per cent less likely to gain extra pounds, compared to kids who went to other

schools, where water drinking was not encouraged.

      Children in the schools with fountains increased their water consumption from about 3 up to 4

glasses a day, while those in the other schools continued to drink an average of 3 glasses. Over

the research, the number of overweight kids upped from 384 to 385 out of 1,641 at the schools

with water fountains. In comparison, the number of overweight kids at the other schools increased

from 339 to 364 out of 1,309, Dr. Muckelbauer said.

      The experts cannot make any final conclusions and explain why the students who were encouraged

to drink water were less likely to gain extra weight. Dr. Muckelbauer noted that according to a few

other studies, drinking of water increases the rate at which calories are burned, while some other

research suggested that water may temporarily decrease appetite (食欲).

1. According to the passage, the journal Pediatrics _____.

A. may cover the subject of the health of children

B. mainly deals with the water drinking problem

C. is mainly about the mental health of kids    

D. must be a journal entitled by a school

2. What do we know about the survey from the passage?

A. The teachers were also encouraged to drink water.

B. The students surveyed were all overweight.

C. It surveyed children in the countryside.    

D. It lasted for a whole school year.

3. What can be learned from the last paragraph?

A. Drinking water certainly decreases appetite.

B. Further research is needed to support the finding.

C. The experts will encourage all the students to drink water.

D. Why students drinking more get less pounds will be clear soon.

4. What would be the best title for the passage?

A. Schools with water fountains          

B. Drink more water and become thinner

C. Water fountains at schools help kids stay thin

D. Water consumption at some German schools

题型:多项选择题

盒形洞的基本特点。下列哪一条是错误()

A.洞底要平

B.线角要圆钝

C.要有一定深度

D.洞壁内倾

E.都不正确

题型:多项选择题

汽油的抗爆性用十六烷值表示。

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