假设某工程1年建成并投产,寿命10年,每年净收益2万元,按10%折现率计算恰好能在寿

题型:单项选择题

问题:

假设某工程1年建成并投产,寿命10年,每年净收益2万元,按10%折现率计算恰好能在寿命期内把期初投资全部收回,(P/A,10%,10)=6.145,则该工程期初投入为()万元。

A.20

B.18.42

C.12.29

D.10

考点:造价工程师工程造价管理基础理论与相关法规工程造价管理基础理论与相关法规
题型:单项选择题

阅读理解。

     Sorry to say, our brains naturally start slowing down at the young age of 30. It used to be thought that

this couldn't be helped, but new studies show that people of any age can train their brains to work faster.

"Your brain is a learning machine," says University of California scientist Dr. Michael Merzenich. Given the

right tools, we can train our brains to act like they did when we were younger. All that's required is the

practice designed just for the purpose: a few exercises for the mind.

     Merzenich has developed a computer-based training method to speed up the process (过程) in which the

brain deals with information (positscience.com). Since much of the data we receive comes through speech,

the Brain Fitness Program works with language and hearing to better speed and accuracy (准确性). Over the

course of training, the program starts asking you to distinguish (tell) sounds (between "dog" and "bog", for

example) at an increasingly faster speed. It's a bit like tennis instructor, says Merzenich, hitting balls at you

faster and faster to keep you challenged. You may start out slow, but before long you're pretty quick.

     The biggest finding in brain research in the last ten years is that the brain at any age is highly plastic. If

you ask your brain to learn, it will learn. And it may even speed up while in the process. To keep your brain

young and plastic you can do one of a million new activities that challenge and excite you:playing table tennis

or bridge, doing crossword puzzles, learning a language...."When it comes to preventing ageing, you really do

'use it or lose it'," says Barbara Sahakian, professor at Cambridge University.

1. People's brains _______ according to the new studies.

A. will not start slowing down until the age of 30

B. will start working slowly after the age of 30

C. can work as well as at a young age through certain exercises

D. can not be improved once they start to slow down

2.What can we learn from the text?

A. Using right tools is important for brains' work.

B. Brain research deals with information from the Internet.

C. Dr. Merzenich is a scientist in computer.

D. Many activities can keep our brains young.

3. Which of the following agrees with the writer's idea?

A. The train methods work better for the old.

B. People should use the brain to stop it from ageing.

C. The training of the brain should start at an early age.

D. It is necessary to take part in as many activities as possible.

题型:单项选择题

在△ABC中,a,b,c分别为内角A,B,C的对边,且2asinA=(2b+c)sinB+(2c+b)sinC,

(1)求A的大小;

(2)求sinB+sinC的最大值。

题型:单项选择题

国际上有一条公认的“马特莱法则”。该法则强调,企业的经营者不应该面面俱到,而应注重抓关键的人、关键的环节、关键的岗位、关键的项目,即以关键的20%带动80%,促进企业的全面发展。该法则给我们的哲学启示是

A.要把握有利时机,促进矛盾转化

B.要抓住主要矛盾,明确主攻方向

C.应突破规律制约,实现跨越发展

D.应把握事物主流,做到统筹兼顾

题型:单项选择题

高血压()

A.右室舒张期负荷增加

B.右室收缩期负荷增加

C.左室舒张期负荷增加

D.左室收缩期负荷增加

E.左、右室负荷增加

题型:单项选择题

Sam _____ some knowledge of the computer just by watching others working on it. [ ]

A. brought up

B. looked up

C. picked up

D. set up

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