动静环与密封腔的间隙太小,会引起机械密封的()。 A.振动、发热 B.周期性泄漏 C

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问题:

动静环与密封腔的间隙太小,会引起机械密封的()。

A.振动、发热

B.周期性泄漏

C.经常性泄漏

D.摩擦副表面磨损过快

考点:中石油调和工初级中石油调和工初级中石油调和工题库
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根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

What is a big dream? (1)           Or, is a big dream something that provides only entertainment? Children dream big dreams, but there are three barriers to realizing dreams. They often kill them before they ever have a chance to grow.

The Self

Immediately following the birth of a big dream, a negative self-talk takes over and gives all the reasons why it cannot happen. This inside voice is the ego(自我). It’s there for protecting and should be listened to. (2)           Most people are influenced by the inside voice. That’s why only a handful of people make their dream come true.

(3)         

Family and friends are a lot like the ego. They want to protect those they love, so they will often list all the reasons why the big dreams won’t come true. Sometimes, family and friends destroy dreams of those they love most, out of their own fear of being left behind.

The World

If one gets past the first two barriers, one has to face the world. (4)           In the past, big dreamers were locked up and sometimes even killed when they were shown to the world. Fortunately, in most of the world today, big dreamers just get laughed at.

The way to realize a big dream is with confidence and action. When children have confidence and then take action, they will be ready to accept any failure. The truth is that every great dreamer whose dreams have never seen the light of success knows failure well. (5)          

A.Family and Friends

B.How Big Dreams Die

C.Does a big dream show one’s future?

D.They simply fail until they succeed.E.It is the last and the most terrible barrier.

F.Sometimes it is right, but more often it is wrong

G.And their big dream is to be a rock star or a famous artist.

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心电图示宽大畸型的QRS波群,其前无P波,代偿间歇完全,心电图诊断为()

A.房性早搏

B.室性早搏

C.房颤

D.室颤

E.结性早搏

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企业发生的下列费用中,不应计入存货成本的有()。

A.采购商品过程中发生的保险费

B.非正常消耗的直按材料、直接人工和制造费用

C.购入原材料后的仓储费用

D.为特定客户设计产品所发生的设计费用

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计量检定必须按照国家计量检定系统表进行,必须执行计量检定规程。

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五输穴是特定穴之一。古代医家把经气在经脉中运行的情况,比作自然界的水流,以说明经气的出入和经过部位的深浅及其不同作用。

阴经五输穴的输穴与原穴的关系是()

A.输穴与原穴合而为一

B.输穴与原穴异位同名

C.输穴与原穴分别设立

D.只有输穴,没有原穴

E.只有原穴,没有输穴

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