We won't be able to leave the office until the rain ______. A. will stopB. stopsC. stoppedD. is stopping

单句语法填空 ( 本 题共 5 小题 ) 在横线处填入适当的关系词 1 . The gentleman _ you met yesterday proved to be a thief 2.题目不完整3 . I'm deeply impressed by the professors and labs _ I visited in Nanjing University 4 . Why can't you realize the part _ they have played in our life ?5 . The first thing _ should be done is to work out a plan.

During ______ fuel is injected and burnt. A the suction stroke B the power stroke C the exhaust stroke

阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。 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 the 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 6 (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.

[单选] The main purpose of the piston oil scraper rings is to （）.A . seal the space between the piston and the linerB . reduce the amount of lube oil burned in the combustion chamberC . transmit heat from the piston to the cylinder linerD . damp out fluctuations of the piston side thrust

No one knows exactly how many disabled people there are in the world，but estimates suggest the figure is over 450million．The number of disabled people in India alone is probably more than double the total population of Canada．In the United Kingdom，about one in ten people have some disability．Disability is not just something that happens to other people：as we get older，many of us will become less mobile，hard of hearing or have falling eyesight．Disablement can take many forms and occur at any time of life．Some people are born with disabilities．Many others become disabled as they get older．There are many progressive disabling diseases．The longer time goes on，the worse they become．Some people are disabled in accidents．Many others may have a period of disability in the form of a mental illness．All are affected by people's attitude towards them．Disabled people face many physical barriers．Next time you go shopping or to work or to visit friends，imagine how you would manage if you could not get up steps，or onto buses and trains．How would you cope if you could not see where you were going or could not hear the traffic？But there are other barriers：prejudice（偏见）can be even harder to break down and ignorance（无知）inevitably represents by far the greatest barrier of all．It is almost impossible for the able-bodied to fully appreciate what the severely disabled go through，so it is important to draw attention to these barriers and show that it is the individual person and their ability，not their disability，which counts．21．The key word in Paragraph 4is ____ ．A．disability B．ignorance C．prejudice D．barriers22．Which of the following statements is NOT true according to the passage？ ____ A．Even the able-bodied may lose some of their body functions when they get older．B．There are about 10percent disabled persons in the UK．C．The whole society should pay due attention to the barriers faced by the disabled people．D．There no longer exists prejudice against the disabled．23．The last word of the passage"counts"most probably means""． ____ A．is most important B．is consideredC．is included D．is numbered24．It can be concluded from the passage that ____ ．A．we should try our best to prevent disablementB．both physical and mental barriers are hard to break downC．we must take a proper attitude towards the disabledD．the able-bodied people will never fully understand the disabled．

The diesel engines have played an important role in the shipping industry because of their improved engine efficiencies and designs compared to other forms of propulsion such as steam or gas_R_. A. turbinesB. enginesC. machinesD. mechanisms

The piston crown may suffer from impingement by the ____ if the atomizer spray is effective. A. combustion flameB. inertiaC. liquidD. fuel spray

What is the passage mainly talking about?A. The usefulness of solar energy.B. Solar energy and its transformation into heat.C. How can solar energy be stored.D. How can solarE. nergy be made to serve man.

Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine byA.natural aspirationB.masked intake valvesC.air ceilsD.scavenging air

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