更多“下列柴油在冬天最不易结冻的是（）柴油。”相关的问题
与明胶作用后形成水不溶性沉淀的是（）
A.木脂素 B.香豆素 C.黄酮 D.皂苷 E.鞣质
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下列货币政策工具中，属于选择性货币政策工具的是( )。A.法定存款准备金率B.再贴现利率C.公开市
下列货币政策工具中，属于选择性货币政策工具的是( )。 A.法定存款准备金率 B.再贴现利率 C.公开市场业务 D.贷款额度控制
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肝昏迷的生化指标改变包括()
A . 血清尿素升高
B . 血清胆红素显著升高
C . 支链氨基酸含量升高
D . 多巴胺升高
E . 芳香族氨基酸含量升高
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Artificial hearts have long been the stuff of science fiction. In "Robocop", snazzy cardiac devices are made by Yamaha and Jensen, and in "Star Trek", Jean-Luc Picard, captain of theEnterprise, has one implanted in the year 2328. In the present day, however, their history has been more chequered. The first serious attempt to build one happened in the 1980s, when Jarvik-7, made by Robert Jarvik, a surgeon at the University of Utah, captured the world"s attention. But Jarvik-7 was a complicated affair that needed to be connected via tubes to machines outside the body. The patient could not go home, nor even turn around in bed. Various other designs have been tried since, but all were seen as temporary expedients intended to tide a patient over until the real thing became available from a human donor.That may be about to change. This week, America"s Food and Drug Administration gave its approval to a new type of artificial heart made by Abiomed, a firm based near Boston. The agency granted a "humanitarian device exemption", a restricted form of approval that will allow doctors to implant the new device in people whose hearts are about to fail but who cannot, for reasons such as intolerance of the immunosuppressive drugs needed to stop rejection, receive a transplant. Such people have a life expectancy of less than a month, but a dozen similarly hopeless patients implanted with Abiomed"s heart survived for about five months.Unlike Dr. Jarvik"s device, this newfangled bundle of titanium and polyurethane aims to set the patient free. An electric motor revolving up to 10,000 times a minute pushes an incompressible fluid around the Abiomed heart, and that fluid, in turn, pushes the blood—first to the lungs to be oxygenated, and then around the body. Power is supplied by an electric current generated in a pack outside the body. This induces current in the motor inside the heart. All diagnostics are done remotely, using radio signals. There are no tubes or wires coming out of the patient.The charger is usually plugged into the mains, but if armed with a battery it can be carried around for hours in a vest or backpack, thus allowing the patient to roam freely. Most strikingly, the device"s internal battery can last half an hour before it needs recharging. That allows someone time to take a shower or even go for a quick swim without having to wear the charger.Abiomed"s chairman, Michael Minogue, does not claim that his firm"s product will displace human transplants. Even so, the firm has big ambitions. It is already developing a new version that will be 30% smaller (meaning more women can use it) and will last for five years. That should be ready by 2008— 320 years earlier than the writers of "Star Trek" predicted.
A．the regulatory approval is limited with respect to the scope of applicationB．the life expectancy will not be improved compared with that indicated by the current recordC．America"s Food and Drug Administration gave its approval to a new type of artificial heartD．Doctors will implants the new device in patients whose hearts are about to fail
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专为儿童介绍计算机及其编程的语言是（）
A、LISP
B、LOGO
C、COBOL
D、PASCAL
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北京矿业学院教学大楼倒塌事故原因中无关的是（）
A.平面组合不合理。
B.地下室沉降。
C.窗间墙承重方案不合理。
D.严重的施工质量问题。
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在Windows 7中，打开Windows资源管理器窗口，在该窗口的右上角有一个搜索框，如果要搜索第1个字符是a,扩展名是txt的所有文本文件，则可在搜索框输入______。
A . ?a.txtB . a*.txtC . *.*D . a?.txt
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对于充分发展的湍流,我们称阻力平方区是指
A. 沿程阻力系数与流速 v 的平方成正比； B. 沿程水头损失与流速 v 的平方成正比； C. 沿程阻力系数与雷诺数 Re 的平方成正比； D. 沿程水头损失与雷诺数 Re 的平方成正比；
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TEXT B Some people believe that international sport creates goodwill between the nations and that if countries play games together they will learn to live together. Others say that the opposite is true: the international contests encourage false national pride and lead to misunderstanding and hatred. There is probably some truth in both arguments, but in recent years the Olympic Games have done little to support the view that sport encourages international brotherhood. Not only was there the tragic incident involving the murder of athletes, but the Games were also ruined by lesser incidents caused principally by minor national contests. One country received its second-place medals with visible indignation after the hockey. There had been noisy scenes at the end of the hockey match, the losers objecting to the final decisions. They were convinced that one of their goals should not have been disallowed and that their opponents’ victory was unfair. Their manager was in a rage when he said, "This wasn’t hockey. Hockey and the International Hockey Federation are finished." The president of the Federation said later that such behavior could result in suspension of the team for at least three years. The American basketball team announced that they wouldn’t yield the first place to Russia, after a disputable end to their contest. The game had ended in disturbance. It was thought at first that the United States had won, by a single point, but it was announced that there were three seconds still to play. A Russian player then threw the ball from one end of the court to the other, and another player popped it into the basket. It was the first time the USA had ever lost an Olympic basketball match. An appeal jury debated the matter for four and a half hours before announcing that the result would stand. The American players then voted not to receive the silver medals. Incidents of this kind will continue as long as sport is played competitively rather than for the love of the game. The suggestion that athletes should compete as individuals, or in non-national teams, might be too much to hope for. But in the present organization of the Olympics there is far too much that encourages aggressive patriotism.
A．The organization of the Olympic Games must be improved.B．Athletes should compete as individuals in the Olympic Games.C．Sport should be played competitively rather than for the love of the game.D．International contests are liable for misunderstanding between nations.
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以下对无饰线体的描述正确的是（）
A.笔画横细竖粗
B.笔画横竖变化微小
C.类似于中文行书
D.类似于中文宋体
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油库操作人员每天应对油气回收装置吸附罐的进气管线进行排凝处理。
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下面对于孕期消化系统的变化叙述错误的是（）。
A.孕酮水平的升高可引起消化道平滑肌松弛，肠蠕动减少
B.消化液分泌降低
C.孕期容易发生恶心，消化不良和便秘
D.孕期对钙、铁的吸收率降低
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在庆祝中国共产党成立95周年大会上,习近平总书记强调指出:“坚持不忘初心,继续前进,要坚持党的基本路线不动摇,不断把中国特色社会主义伟大事业推向前进。”改革开放以来,党和国家领导人一再强调要毫不动摇地坚持党的基本路线。这主要是因为,实践已经证明党的基本路线是
A. 党和国家的生命线、人民的幸福线 B. 兴国、立国、强国的重大法宝 C. 实现科学发展的政治保证 D. 思想路线的核心
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电容型感温环线当温度升高时，其电容量()。
A.增大B.减小C.不变D.不能确定
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