The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called__________.A. engine displacementB. super-aspiratingC. air injectionD. supercharging

The events of each of  the______ diesel engine are suction，compression，expansion and exhaust.Starting with the piston at the top of the cylinder，the suction stroke is performed as the piston moves down.（ ）A. two-strokeB. four-strokeC. low speedD. all kinds of

A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）A. ignition lagB. engine horsepowerC. lube oil system pressureD. specific fuel consumption

The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in __________.A. increased compression ratioB. decreased compression ratioC. increased bearing clearanceD. decreased bearing clearance

[单选] In a bypass type lubrication system for a diesel engine， the dirty oil line to the centrifuge should be taken from the （）。A. lube oil pump suction lineB. lube oil pump discharge lineC. bottom of the lube oil sumpD. outlet from the lube oil header

Let's wait________ the rain stops.（ ）A. soB. whileC. sinceD. until

Section BDirections: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.Evaluating employee performance is a key of management skills. The challenge is to give the employees an accurate picture of chief accomplishments, and of the areas in which they need to prove. Both are important: accomplishments because they give the empl0Yee a sense of pride in the work and basis on which to build future achievements, and areas for improvement, because they give the employee some goals to reach for. Often, employees fear that the evaluation will be a negative experience. This fear alone can endanger defensiveness and tension which result in self-fulfilling prophecy. The supervisor must take pains to alleviate (减轻) the employee"s fear and make the evaluation a participatory event. An employee who contributes ideas to his or her evaluation will be much more likely to agree with the outcome and be willing to follow the recommendations. The employees must always bear in mind that the sole legitimate domain of an employee appraisal system is to improve employees" performance. While areas needing improvement must be done reviewed, this should always be done in the spirit of discovering goals that the employee can work toward. This holds true for reviewing success as well. While praise for past achievements may be used as reward, to endanger loyalty, or for other reasons, at the time of evaluation, the primary reason to look at the person"s successes is to determine areas in which he or she can continue to excel; perhaps, the most effective way to make the evaluation a participatory event is to ask the employee to come prepared for the meeting. The employer and the employee each should carefully review the job description prior to the evaluation meeting and should make notes on areas in which the employee had difficulty or has made a contribution. At the evaluation meeting, the employer must establish a positive and comfortable mood. The employee should be invited to review his or her lists first. Almost always the employee"s notes will be very similar to what the employer has written. If the employer simply verifies what the employee has said, the employee will be much less anxious about the procedure, and much more likely to work toward the goals.Evaluation is often a negative experience because______.A．the employee has to defend himselfB．the employee is tense, and the employer does not alleviate thisC．the employee has done a bad jobD．the employer is going to give the employee some goals that cannot be reached

The ____ is subject to the highest combustion pressure and thermal load.A. gudgeon pinB. piston ringC. piston skirtD. piston crown

In a diesel engine， fuel must be broken up into a spray of fine droplets to （）.A. increase its qualityB. obtain complete burningC. reduce its weightD. all of the above

[2020全国Ⅲ卷]In ancient China lived an artist 1 paintings were almost lifelike. The artist`s-|||-reputation had made him proud. One day the emperor wanted to get his portrait(画像)done so he called all great-|||-artists to come and present their 2 (fine) work,so that he could choose the best. The artist was sure he-|||-would 3 (choose),but when he presented his masterpiece to the emperor`s chief minister, the old man-|||-laughed.The wise old man told him to travel to the Li River-perhaps he could learn a little from the greatest artist-|||-in the world.-|||-Filled with 4 (curious),the artist packed his bags and left. 5 he asked the villagers on the-|||-banks of the river where he could find the legendary(传奇的)artist,they smiled and 66 (point)down the-|||-river.The next morning he hired a boat and set out 7 (find)the well-known painter.As the small boat-|||-moved 8 (gentle)along the river he was left speechless by the mountains being silently reflected in the-|||-water.He passed milky white waterfalls and mountains in many shades of blue.And when he saw the mists rising from-|||-the river and the soft clouds 9 (surround) the mountain tops,he was reduced to tears.The artist was finally-|||-humbled(谦卑)by the greatest artist 10 earth,Mother Nature.-|||-1. __ 2. __ 3. __ 4. __ 5. __-|||-6. __ 7. __ 8. __ 9. __ 10. __

热门问题