有一个有效三段论的大前提是肯定的,大项在结论中周延,小项在前提中不周延。那么,此三段

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问题:

有一个有效三段论的大前提是肯定的,大项在结论中周延,小项在前提中不周延。那么,此三段论是哪一格的什么式?

考点:哲学逻辑学逻辑学题库
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如图所示,半径为r的圆形空间内,存在着垂直于纸面向里的匀强磁场,一个带电粒子(不计重力),从A点以速度v0垂直磁场方向射入磁场中,并从B点射出,∠AOB=1200,则该带电粒子在磁场中运动的时间为(   )

A.2πr/3v0

B.2πr/3v0

C.πr/3v0

D.πr/3v0

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阅读理解。

    Living in a green area can make you live longer, according to research published

today. The research also shows that the difference in life expectancy (预期寿命)

between rich and poor becomes smaller among those who live in an environment

with parks and trees.

    Richard Mitchell, from Glasgow University, and his colleagues, found that the gap

between the number of deaths of people on high incomes and the number of deaths

of those on low incomes in green areas was half that compared with figures relating

to built-up areas.

    Green spaces, classified by the researchers as "open, undeveloped land with natural

vegetation", encouraged people to walk and be more active. Exercise in these settings

could have greater benefits than exercise elsewhere, the researchers said.

    The benefits potentially go beyond exercise. Studies have shown that being around

green spaces can reduce blood pressure and stress levels, and possibly help patients

recover faster.

    A number of researchers have looked at the effects of greenery on our well-being.

But few studies had looked at whether living in green areas reduced health inequalities,

the Glasgow team said.

    Using information from a land-use database of 2001, the researchers divided the

pre-retirement population of England into four groups according to income level, and

five groups according to access to green space. They then looked at death rate for

2001~2005. They found that the inequality in death rate from all causes relating to lack

of money was less in those populations in the greenest areas compared with the figures

for people living in more built-up places.

    They found an even stronger relationship when it came to deaths from certain diseases

such as heart conditions and stroke (中风). There was no difference, however, in deaths

from lung cancer.

    The researchers said that changing the physical environment was an easier way to fight

against poor health than using media campaigns or giving out information on health. "The

result of the study is clear: Environments that promote good health might be very important

in the fight to reduce health inequalities."

1. The underlined word "that" in Paragraph 2 refers to _____. [ ]

A. the gap

B. the number of deaths

C. the income

D. the living area

2. What was the special point of the Glasgow team's research? [ ]

A. They offered a scientific definition of "green spaces".

B. They encouraged people to exercise in green areas.

C. They studied the effects of greenery on people's health.

D. They focused on the influence of greenery on health inequalities.

3. What advice would the researchers probably give according to the last paragraph? [ ]

A. More health information should be given to the public.

B. People should take more exercise every day.

C. More trees and grass should be planted in cities.

D. People should help to fight against health problems.

4. What is the main idea of the passage? [ ]

A. People should live in green areas.

B. Green spaces promote good health.

C. Income influences health less than environment.

D. Exercise in green areas benefits people a lot.

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离子交换器出水弧型孔板开孔面积宜为出水管面积的()倍。

A.1~2

B.2~3

C.1

D.4~6

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知识产权是指民事主体依法享有的专有权利,以下表述中错误的是( )。

A.知识产权是不具有物质形态的智力成果

B.知识产权具有人身权或财产权

C.知识产权在法律规定的期限内有效

D.知识产权的权利主体依法享有独占使用的权

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简述欧洲浪漫主义文学代表人物及其成就。

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