某设备目前实际价值为10000元,设备净残值为零,年均低劣化增加值为400元,则该设

题型:单项选择题

问题:

某设备目前实际价值为10000元,设备净残值为零,年均低劣化增加值为400元,则该设备最优更新期为()。

A.5年

B.6年

C.7年

D.8年

考点:建设工程经济1Z101000工程经济1Z101000工程经济题库
题型:单项选择题

我国划分为东部、中部和西部三大经济地带。据此回答题。

小题1:下表表示划分我国三大经济地带的各项指标(“◎”的多少表示优势的大小)。据表判断,我国三个经济地带的排序(东、中、西)与表中数码相符的是(   )

 矿产和能源资源经济基础发展水平对外开放程度
◎◎◎
◎◎◎◎◎◎◎◎◎
◎◎◎◎◎◎◎◎
   A.①②③       B.③②①       C.①③②       D.②③①

小题2:分别位于东、中、西部经济地带的省区是(   )

A.四川、江西、浙江

B.内蒙古、甘肃、山东

C.江苏、山西、陕西

D.福建、青海、河南

题型:单项选择题

阅读理解

     The evidence for harmony may not be obvious in some families. But it seems that four out of five

young people now get on with their parents, which is the opposite of the popularlyheld image of unhappy

teenagers locked in their room after endless family quarrels.

     An important new study into teenage attitudes surprisingly shows that their family life is more

harmonious than it has ever been in the past."We were surprised by just how positive today's young

people seem to be about their families, "said one member of the research team."They're expected to be

rebellious(叛逆的)and selfish but actually they have other things on their minds; they want a car and

material goods, and they worry about whether school is serving them well.There's more negotiation(商

议) and discussion between parents and children, and children expect to take part in the family

decisionmaking process.They don' t want to rock the boat. "

     So it seems that this generation of parents is much more likely than parents of 30 years ago to treat

their children as friends."My parents are happy to discuss things with me and willing to listen to me," says

17yearold Daniel Lazall. "I always tell them when I'm going out clubbing.As long as they know what I'm

doing,they're fine with it."Susan Crome, who is now 21, agrees."Looking back on the last 10 years, there was a lot of what you could call negotiation. For example, as long as I'd done all my homework,I could

go out on a Saturday night. But I think my grandparents were a lot stricter with my parents than that."

     Maybe this positive view of family life should not be unexpected. It is possible that the idea of teenage

rebellion is not rooted in real facts. A researcher comments, "Our surprise that teenagers say they get

along well with their parents comes because of a brief period in our social history when teenagers were

regarded as different beings. But that idea of rebelling and breaking away from their parents really

happened during the 1960s when everyone rebelled. The normal situation throughout history has been a

smooth change from helping out with the family business to taking it over."

1. What is the popular images of teenagers today?

A. They worry about school.

B. They dislike living with their parents.

C. They have to be locked in to avoid troubles.

D. They quarrel a lot with other family members.

2. The study shows that teenagers don't want to ________.

A. share family responsibility

B. cause trouble in their families

C. go boating with their family

D. make family decisions

3. Compared with parents of 30 years ago,today's parents______.

A. go to clubs more often with their children

B. are much stricter with their children

C. careless about their children's life

D. give their children more freedom

4. According to the author, teenage rebellion________.

A. may be a false belief

B. is common nowadays

C. existed only in the 1960s

D. resulted from changes in families

题型:单项选择题
电气化铁路的输电线常用图所示的方式悬挂在钢缆上.钢缆的A端固定在电杆上,B端连接在滑轮组上.滑轮组由a、b、c三个滑轮构成,配重P由多个混凝土圆盘悬挂在一起组成,配重的总重为G,若不计摩擦和滑轮的重量,则以下说法中正确的是(  )

A.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

B.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

C.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

D.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

题型:单项选择题

读下面经纬网格图,B点地理坐标为()

A.10°S,170°E

B.10°N,170°W

C.10°N,170°E

D.10°S,170°W

题型:单项选择题

Government officials reported three new cases of mad cow, bringing the total so far this year to 99. Last year, France recorded just 31 cases of the mad cow disease. The rising numbers are in part (1) a new testing program that focuses on cows that are most (2) . That program has (3) 39 cases. But still 60 new cases were identified in the usual way, (4) were found in 1999. Many scientists (5) that this year, five years after safety precautions were (6) , the number of cases would be (7) .

The rise in cases has (8) some scientists to question whether the disease can be transmitted in ways not yet understood. Scientists are still (9) the disease, first recognized in cows in 1986.

It appears that it is not caused by a bacteria, virus or fungus, but (10) infectious particles called prion, perhaps (11) a virus or other agent. The disease kills cells in the brain, (12) it spongy and full of holes.

France has taken more steps to (13) safety than most European countries, (14) refusing to take English beef (15) the European Union. But some scientists believe that France has not been (16) in imposing the ban on feed that (17) animal pans.

Some French officials hope that the sudden interest in mad cow disease will mean that French consumers will become educated about it, thereby recognizing that French beef is actually (18) controlled. Every cow is given a passport at birth, and extensive information about its parentage and (19) it was raised must be (20) to any slaughterhouse. When a diseased animal is found, the entire herd is destroyed.

14()

A.including

B.excluding

C.containing

D.enclosing

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