上消化道大量出血是指短期内出血量多于（） A.500ml B.800ml C

孙中山、毛 * * 和邓 * * 是20世纪以来中国站在时代前列的三位伟大人物，他们分别创立了各自的思想理论，推动了中国社会三次历史性的巨大变化。（10分）

结合所学知识，回答以下问题：

（1）1924年孙中山提出的新三民主义与旧三民主义相比，有了质的飞跃，主要体现在哪里？新旧三民主义对中国民主革命起了什么历史作用？（3分）

（2）在新民主主义革命时期，毛 * * 把马克思主义与中国革命的具体实践相结合，取得了哪两大创新理论成果？（2分）

（3）在社会主义现代化建设新时期，邓 * * 理论逐渐形成。在中共十二大上，邓 * * 明确提出了怎样的思想观点？邓 * * 理论对中国现代化建设有怎样的指导意义？（3分）

（4）综合以上问题，概括20世纪以来中国重大理论成果的共同点。（2分）

临床上常用“X线硬度”表示（）

A.X线量

B.X线质

C.曝光量

D.管电压

E.管电流

以下做法中，属于自然消退强化方法的有（）。

A.员工出现失误时，给以记过处分

B.对爱打小报告者采取冷漠态度，使之因自讨没趣而放弃这种不良行为

C.员工表现出色时，给他发奖金

D.对请客送礼者，关门拒之

E.对喜欢奉承拍马屁者，冷脸相待

阅读理解

     Why should mankind explore space? Why should money, time and effort be spent exploring and

researching something with so few apparent benefits? Why should resources be spent on space rather

than on conditions and people on Earth? These are questions that, understandably, are very often asked.

     Perhaps the best answer lies in our genetic makeup (基因构成) as human beings.What drove our

ancestors to move from the trees into the plains, and on into all possible areas and environments? The

wider the spread of a species, the better its chance of survival.Perhaps the best reason for exploring

space is this genetic tendency to expand wherever possible.

     Nearly every successful civilization has explored, because by doing so, any dangers in surrounding

areas can be identified and prepared for.Without knowledge, we may be completely destroyed by the

danger.With knowledge, we can lessen its effects.

     Exploration also allows minerals and other potential (潜在的) resources to be found.Even if we have

no immediate need of them, they will perhaps be useful later.Resources may be more than physical

possessions.Knowledge or techniques have been acquired through exploration.The techniques may have

medical applications which can improve the length or quality of our lives.We have already benefited from

other spinoffs including improvements in earthquake prediction, in satellites for weather forecasting and in

communications systems.Even nonstick pans and mirrored sunglasses are byproducts (副产品) of

technological developments in the space industry!

      While many resources are spent on what seems a small return, the exploration of space allows

creative, brave and intelligent members of our species to focus on what may serve to save us.While

space may hold many wonders and explanations of how the universe was formed or how it works, it also

holds dangers.The danger exists, but knowledge can help human beings to survive.Without the ability to

reach out across space, the chance to save ourselves might not exist.

     While Earth is the only planet known to support life, surely the adaptive ability of humans would allow

us to live on other planets.It is true that the lifestyle would be different, but human life and cultures have

adapted in the past and surely could in the future.

1. Why does the author mention the questions in Paragraph 1?

A. To express his doubts.

B. To compare different ideas.

C. To introduce points for discussion.

D. To describe the conditions on Earth.

2. What is the reason for exploring space based on Paragraph 2?

A. Humans are natureborn to do so.

B. Humans have the tendency to fight.

C. Humans may find new sources of food.

D. Humans don't like to stay in the same place.

3. The underlined word "spinoffs" in Paragraph 4 probably refers to________.

A. survival chances  

B. potential resources

C. unexpected benefits  

D. physical possessions

4. What makes it possible for humans to live on other planets?

A. Our genetic makeup.

B. Resources on the earth.

C. The adaptive ability of humans.

D. Byproducts in space exploration.

设备巡检时域分为（）等检查。

A.设备运行期间

B.设备停机过程中

C.设备停运期间

D.设备开机过程中