设备更新的核心工作,是确定设备的经济寿命。设备的寿命包括自然寿命、技术寿命和经济寿命

题型:单项选择题

问题:

设备更新的核心工作,是确定设备的经济寿命。设备的寿命包括自然寿命、技术寿命和经济寿命。自然寿命也称物理寿命,是指设备从全新状态下开始使用,直到不堪再用而予以报废的全部时间过程,自然寿命主要取决于设备有形磨损的速度。技术寿命是指设备在开始使用后持续的能够满足使用者需要功能的时间,其时间长短主要取决于无形磨损的速度,技术进步速度越快,设备的技术寿命越短。经济寿命是指从经济角度判断的设备最合理的使用年限,在数值上等于使投入使用的设备等额年总成本(包括初始购置费用和使用过程中的年运营费用)最低或等额年净收益最高的期限,经济寿命是有形磨损和无形磨损共同决定的。

不能作为设备更新估算依据的是设备的( )寿命。

A.技术
B.经济
C.自然
D.有效

考点:一级建造师建设工程经济建设工程经济
题型:单项选择题

在一个 Ethernet 中,有 A、B、C、D 四台主机,如果 A 向 B 发送数据,那么______。

A.只有 B 可以接收到数据

B.四台主机都能接收到数据

C.只有 B、C、D 可以接收到数据

D.四台主机都不能接收到数据

题型:单项选择题

Ⅲ 阅读(共两节。满分40分)

阅读理解(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。

A

Cold weather has a great effect on how our minds and our bodies work. Maybe that is why there are so many expressions that use the word cold. For centuries, the body’s blood has been linked closely with the emotions. People who show no human emotions or feelings, for example, are said to be cold-blooded. Cold-blooded people act in merciless ways. They may do brutal things to others, and not by accident. For example, a newspaper says the police are searching for a cold-blooded killer. The killer murdered someone, not in self-defense. He seemed to kill for no reason, and with no emotion, as if taking someone’s life meant nothing. Cold can affect other parts of the body. The feet, for example. Heavy socks can warm your feet, if your feet are really cold. But there is an expression -- to get cold feet -- that has nothing to do with cold or your feet.

The expression means being afraid to do something you had decided to do. For example, you agree to be president of an organization. But then you learn that all the other officers have resigned. All the work of the organization will be your responsibility. You are likely to get cold feet about being president when you understand the situation.

Cold can also affect your shoulder. You give someone the cold shoulder when you refuse to speak to them. You treat them in a distant, cold way. The expression probably comes from the physical act of turning your back toward someone, instead of speaking to him face-to-face. You may give a cold shoulder to a friend who has not kept a promise he made to you. Or, to someone who has lied about you to others.

A cold fish is not a fish. It is a person. But it is a person who is unfriendly, unemotional and shows no love or warmth. A cold fish does not offer much of himself to anyone.

Out in the cold is an expression often heard. It means not getting something that everybody else got. A person might say that everybody but him got a pay raise, that he was left out in the cold. And it is not a pleasant place to be.

41. The passage is intended to tell us that______.

A. cold weather has a great effect on human bodies

B. many English expressions contain the word cold

C. cold is a word closely linked with human emotions

D. the word cold has many different meanings in English

42. The underlined word brutal in paragraph 1 most probably means _______.

A. impolite      B. illegal      C. cruel          D. extreme

43. Which of the following expressions can best describe a person who is unwilling to offer anything to others?

A. Cold-blooded.                 B. To get cold feet.

C. A cold shoulder.                D. A cold fish.

44. You can say Tom ______ if the teacher gives all the boys except him a pen as a prize.

A. is given the cold shoulder

B. is left out in the cold

C. has got cold feet

D. is murdered by a cold-blooded killer

45. We can draw a conclusion from the passage that ______.

A. all the expressions containing the word cold have a negative meaning

B. all the expressions containing the word cold have something to do with cold

C. People who show no human emotions or feelings have cold blood

D. Many parts of the human body can be badly affected by cold.

题型:单项选择题

下列属于黄种人的有

①中国人②日本人③法国人④埃及人[ ]

A.①②

B.②④

C.①④

D.②③

题型:单项选择题

人的职业道德品质反映着人的整体道德素质。

题型:单项选择题

327/64×8的值是( )。

A.4

B.321/8

C.327/8

D.39/8

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