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You notice that your RMAN script used to copy the datafiles， control files， and archived redo log files is performing very slowly. Which two changes might you want to include in your RMAN script to speed up the COPY commands？（）
A . NOCHECKSUM
B . MAXCORRUPT
C . CHECK LOGICAL
D . BACKUP INCREMENTAL
E . CONFIGURE DEVICE TYPE ... PARALLELISM
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When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）
A . an obstruction in an cylinder
B . water accumulation in some engine cylinders
C . low starting air pressure
D . low scavenge air pressure
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How should you signal the crane operator to move slowly（）.
A . Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signa
B . Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desired
C . First tap your elbow with one hand and then proceed to use regular signals
D . First tap the top of your head with your fist and then proceed to use regular signal
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移位式客车整备所 moving stock depot for passenger car
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The remaining oil/water mixture now flows down into the fine separating compartment and moves slowly between the（） in the Turbulo separator.
A . catch plates
B . swash plates
C . cover plates
D . bedplate
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GM envisions a system（）connects intelligent cars to each other and to remote servers in a vast, moving peer-to-peer network that would let them（）efficiently and in sync.
A . that; to travel
B . which; travel
C . where; travel
D . that; travel
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\Red cooking\ is a process where meat is slowly cooked in dark soy sauce.
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I looked and looked，and at last I made out two figures moving slowly in the _______.
A.end
B.distance
C.past
D.wild
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Tropical insects do very well in a narrow band of temperatures, but move them above that_____and they die
A.range
B.order
C.rank
D.XX
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Grandma told the story in a very sad______and we were all moved.
A．sound
B．tune
C．music
D．tone
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The remaining oil/water mixture now flows down into the fine separating compartment and moves slowly between the_____ in the Turbulo separator.
A.catch plates
B.swash plates
C.cover plates
D.bedplates
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The new car at the motor-show was a very unusual shape.
A．rare
B．common
C．strange
D．curious
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Bill was very ______ when he saw the people injured in the car accident.
A．awkward
B．emotional
C．indignant
D．relaxed
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Changes in climate（) place slowly through the years.
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At the 1986 Chernobyl nuclear accident, there was a very large release of radioactivity in a few minutes, followed by a slowly declining release rate over several months. The total release is estimated to have been about 5×10<sup>7</sup>curies The winds carried the released materials all the way to Sweden, from which the first reports came that there had been a nuclear accident in the USSR.
For the purposes of this problem assume that there was an instantaneous release of 10<sup>7</sup>curies of radioactive gases (and fine particles, which are assumed to remain in the atmosphere and not settle out). Then estimate the maximum ground level concentration of radioactive gases (curies/m<sup>3</sup>) when the radioactive cloud from the accident got to Sweden. Make the following assumptions:
(1) Ignore decay of the radioactive gases (i.e., assume their half-lives were infinite).
(2) Assume the distance between Chernobyl and Sweden is 1000 km.
(3) Assume that the wind speed was 3 m/s and the stability class C.
(4) Assume that the mixing height was 2000 m.
(5) Assume that mlXmg in the x direction(up and down the direction of the wind) has the same intensity as miXing in the y(crosswind)direction.
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听力原文：Nike is one of the most powerful marketing companies in the business world today, but it had very small beginnings. The global giant company stated in the 1960s with the company's founders selling cheap Japanese sport shoes to American high school athletes at school track meetings, using a supply of shoes they kept in their cars.
What is the purpose of this talk？
A．Introducing a product
B．Telling a company's history
C．Complaining a product
D．Promoting sales
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The Inductrack Ⅱ design can produce a very strong magnetic field even when the train runs more slowly by ______.
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Migration is usually defined as "permanent or semi-permanent change of residence". However, our concern is with movement between nations, not with internal migration within nations, although such movements often exceed international movements in volume. Today, the motives of people who move short distances are very similar to those of international migrants.
Students of human migration speak of "push" and "pull" factors, which influence an individual's decision to move from one place to another. Push factors are associated with the place of origin. A push factor can be as simple and mild a matter as difficulty in finding a suitable job, or as traumatic as war, or severe famine. Obviously, refugees who leave their homes with guns pointed at their heads are motivated almost entirely by push factors (although pull factors do influence their choice of destination).
Pull factors are those associated with the place of destination. Most often these are economic, such as better job opportunities or the availability of good land to farm. In general, pull factors add up to an apparently better chance for a good life and material well-being than is offered by the place of origin. When there is a choice between several attractive potential destinations, the deciding factor might be a non-economic consideration such as the presence of relatives, friends, or at least fellow countrymen already established in the new place who are willing to help the newcomers settle in.
Besides push and pull factors, there are what the sociologists call "intervening obstacles." Even if push and (or) pull factors are very strong they still may be outweighed by intervening obstacles, such as the distance of the move, the trouble and cost of moving, the difficulty of entering the new country, and the problems likely to be encountered on arrival. The decision to move is also influenced by "personal factors" of the potential migrant. The prospect of packing up everything and moving to a new and perhaps very strange environment may appear interesting and challenging to an unmarried young man and appallingly difficult to a slightly older man with a wife and small kids. Similarly, the need to learn a new language and customs may excite one person and frighten another. Regardless of why people move, migration of large numbers of people causes conflict. The United States and other western countries have experienced adjustment problems with each new wave of immigrants. It has usually taken several decades for each group to be accepted into the mainstream of society in the host country.
Today it is found that movement between nations often exceed international movements in volume.
A．True
B．False
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The reason why the writer's car began to move from side to side is ______.
A．there was something wrong with his car
B．he ate apples as he drove
C．an earthquake began to happen
D．he drove too fast
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Uncle is very angry.His car ______ during the night.
A．steal
B．stole
C．was stolen
D．is stolen
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What is the teacher doing in terms of error correction？T: Make a sentence with 'have'.tS: He have a car.T: He HA VE a car？S: He HA S a car.T: Very good. He HAS a car.
A、Direct correction.
B、Indirect correction.
C、Self-correction.
D、Peer correction.
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_______are fast-moving and exciting. Often they’re very violent.
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What is the teacher doing in terms of error correction？T:Make a sentence with'have'!S:He have a ear．T:He HAVE a car？S:He HAS a car．T:Very good．He HAS a car．
A、Direct correction．
B、Indirect correction．
C、Self-correction．
D、Peer correction．
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What do you call the four rubber circles you need for your car to move？
A．balls
B．tires
C．rearview mirrors
D．side mirrors
