Very common in a particular place or among a particular group:

A . by injection pumps B . at a time decided by the injection pump timing C . by a signal opening the magnetic valves D . at a time decided by the cam directly

A . Shape of the piston crowns B . Increasing the compression ratios C . Increasing the piston crowns D . Increasing the turbocharger gear ratio

A . 360° B . 270° C . 180° D . 90&deg

A . live B . living C . lived D . tolive

A . sprocket B . Kenter link C . swivel D . end shackle

Most previous international gatherings on this subject have not seen the same intensity of delegate inter est. Many nations have gone through a shock of recognition. A decade ago, only those nations identified as "producing countries" also become "consuming countries", but many have witnessed the growth within their borders of drug trafficking gangs (often allied with terrorists) so powerful they present a danger to the state's stability. Many developing countries now have the worst of both worlds, in that they grow their own people. There is a growing sense of fright in ninny governments that matters are out of control and the single way to recover is through cooperation with other countries. The high points of the conference were the drafting of two documents, both of which were adopted with out a disagreed vote. One was a joint declaration of intent to combat drag abuse and traffic. The other consisted of many detailed suggestions for particular regional and national policies. Overall, the conference developed a two-level action plan. The focus was on ways to curb the demand for dangerous drugs and on methods of destroying at least interrupting the distribution process. On the demand side, the delegates recommended the establishment of a system for collecting information on the nature and scope of narcotics use. In addition, they concluded that drug education should be taught in schools and that governments and labor organizations should act together in the anti-drug campaign in the work place. The delegates also recommended strict adherence to international agreements to curb the supply of narcotics. The United Nations Conference was held to discuss ______. A．ideological and individual differences B．production C．drug abuse D．nations of file world

However, biological understanding is not enough:【B2】itself, it can never tell us what human beings are.【B3】to our physical equipment—the naked human body—we are not an【B4】animal. We are tropical creatures,【B5】hairless and sensitive to cold. We are not fast and have neither claws nor sharp teeth to defend ourselves. We need a lot of food but have almost no physical equipment to help us get it. In the purely physical【B6】, our species seems a poor【B7】for survival. But we have survived—survived and multiplied and【B8】the earth. Some day we will have a【B9】living on the moon, a place with neither air nor water and with temperatures that turn gases into solids. How can we have done all these things？ Part of the answer is physical.【B10】its limitations, our physical equipment has some important potentials. Inhabitants of our eventual moon colony will bring their own food and oxygen and then create an artificial earth environment to supply necessities. 【B1】 A．processes B．acts C．modes D．procedures

No man ever looks at the world with pristine(未受外界影响的) eyes. He sees it edited by a definite set of customs and institutions and ways of thinking. Even in his philosophical probings he cannot go behind these stereotypes(固定的模式); his very concepts of the true and the false will still have reference to his particular traditional customs. John Dewey has said in all seriousness that the part played by custom in shaping the behavior. of the individual as over against any way in which he can affect traditional custom, is as the proportion of the total vocabulary of his mother tongue over against those words of his own baby talk that are taken up into the language of his family. When one seriously studies social orders that have had the opportunity to develop independently, the figure(这种比喻) becomes no more than an exact and matter-of- fact observation. The life history of the individual is first and foremost an adjustment to the patterns and standards traditionally handed down in his community. From the moment of his birth the customs into which he is born shape his experience and behavior. By the time he can talk, he is the little creature of his culture, and by the time he is grown and able to take part in its activities, its habits are his habits, its beliefs his beliefs, its impossibilities his impossibilities. The author thinks the reason why custom has been ignored in the academic world is that______. A．custom reveals only the superficial nature of human behavior B．the study of social orders can replace the study of custom C．people are still not aware of the important role that custom plays in forming our world outlook D．custom has little to do with our ways of thinking

A．vote B．receive dividends． C．receive interest payments． D．only A and B of the abov E．