露天矿生产工艺流程包括穿孔爆破、采装、()、排土。

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问题:

露天矿生产工艺流程包括穿孔爆破、采装、()、排土。

考点:公路养护工考试初级公路养护工初级公路养护工题库
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已知:函数f(x)对一切实数x,y都有f(x+y)-f(y)=x(x+2y+1)成立,且f(1)=0.
(1)求f(0)的值.
(2)求f(x)的解析式.
(3)已知a∈R,设P:当0<x<
1
2
时,不等式f(x)+3<2x+a恒成立;Q:当x∈[-2,2]时,g(x)=f(x)-ax是单调函数.如果满足P成立的a的集合记为A,满足Q成立的a的集合记为B,求A∩CRB(R为全集).
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Agence Rrance-Presse--- French doctors this week carried out the world’s first operation on a human in zero gravity, using a specially adapted aircraft to create conditions in space.

During a three-hour flight from Bordeaux in southwest France, the team of surgeons and anesthetists (麻醉师) successfully removed a benign tumor (良性瘤) from the forearm of a 46-year-old volunteer. The experiment was part of a program backed by the European Space Agency to develop techniques for performing robotic surgery aboard the International Space Station or at a future Moon base.

“Now we know that a human being can be operated on in space without too many difficulties,” says the team leader Dr. Dominique Martin.

Under normal ground conditions, the operation would be performed under a local anesthetic. Without gravity, the surgeon’s work is harder and the patient’s body reacts differently. Blood doesn’t pump in the same way.

The custom-designed Airbus 300 aircraft performed a series of parabolic swoops (抛物线飞行), each creating between 20 seconds of weightlessness. The process was repeated 32 times.

Fixed inside a custom-made operating block, three surgeons and two anesthetists worked during these periods, with their instruments held in place with magnets around the patient’s bed. The next part of the program is to carry out a remote-controlled operation using a robot controlled from the ground by satellite. This experiment should take place within a year, Martin says.

Anesthetist Dr. Laurent de Coninek says that zero-gravity surgery offers huge promise for space exploration, although it would at first be limited to treating simple injuries. Today more than 400 people have already traveled into space. The chances of injuries occurring during missions will become even greater and to bring a wounded person back to the earth for treatment is both risky for them and expensive.

67. What would be the best title for the test?

A. A Special Operation for Doctors            B. First Operation on the Moon

C. World’s First Operation in Zero Gravity      D. An Important Experiment for Doctors

68. What’s the purpose of the operation?

A. To have an experiment on space operation.    B. To cure the patient.

C. To do it at the request of the patient.               D. To reduce the danger of operation on earth.

69. It is difficult for doctors to do operations in space because________________.

A. the patient’s illness will be more serious           B. the patient has no feeling about pain

C. the patient’s body reacts differently               D. the patient’s flood will stop flowing

70. The last paragraph mainly wants to tell readers________________.

A. there are many people injured in space           B. it is necessary to do the experiment

C. it is risky to travel in space                             D. there is no need to bring patients in space to the earth

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在PowerPoint2003中美化演示文稿版面时,以下说法错误的是()。

A、设置幻灯片切换效果,可以使整套演示文稿有统一的风格

B、可以单独对某张幻灯片的背景进行设置

C、可以单独设置某张幻灯片的配色方法

D、无论是套用模版、修改配色方案还是设置背景,既可以单独设置某张幻灯片、也可以应用于所有幻灯片

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我国华山的成因是()

A、向斜山

B、背斜山

C、断块山

D、火山

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接受视束冲动的结构是()。

A.内侧膝状体

B.外侧膝状体

C.腹后内侧核

D.腹外侧核

E.腹后外侧核

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