更多“Le jour _____ Paul est arrivé ”相关的问题
Jan Hendrik Schon"s success seemed too good to be true, and it was. In only four years as a physicist at Bell Laboratories, Schon, 32, had co-authored 90 scientific papers—one every 16 days—detailing new discoveries in superconductivity, lasers, nanotechnology and quantum physics. This output astonished his colleagues, and made themsuspicious. When one co-worker noticed that the same table of data appeared in two separate papers—which also happened to appear in the two most prestigious scientific journals in the world, Science andNature—the jig was up. In October 2002, a Bell Labs investigation found that Schon had falsified andfabricateddata. His career as a scientist was finished. Scientific scandals, which are as old as science itself, tend to follow similar patterns of presumption and due reward.In recent years, of course, the pressure on scientists to publish in the top journals has increased, making the journals much more crucial to career success. The questions are whether Nature and Science have become too powerful as arbiters of what science reaches to the public, and whether the journals are up to their task as gatekeepers.Each scientific specialty has its own set of journals. Physicists have Physical Review Letters, neuroscientists have Neuron, and so forth. Science and Nature, though, are the only two major journals that cover the gamut of scientific disciplines, from meteorology and zoology to quantum physics and chemistry. As a result, journalists look to them each week for the cream of the crop of new science papers. And scientists look to the journals in part to reach journalists. Why do they care Competition for grants has gotten so fierce that scientists have sought popularrenownto gain an edge over their rivals. Publication in specialized journals will win theacclaimsfrom academics and satisfy the publish-or-perish imperative, butScienceandNaturecome with the added bonus of potentially getting your paper written up inThe New YorkTimes and other publications.Scientists tend to pay more attention to the big two than to other journals. When more scientists know about a particular paper, they"re more apt to cite it in their own papers. Being oft-cited will increase a scientist"s "hnpact Factor," a measure of how often papers are cited by peers. Funding agencies use the "Impact Factor" as a rough measure of the influence of scientists they"re considering supporting.
A．surprisingB．inconceivableC．praiseworthyD．fraudulent
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飞机前缘结冰对飞行的主要影响（）.
A . A、增大了飞机重量，便起飞困难
B . B、增大了飞行阻力，使所需发动机推力大幅增加
C . C、增大了临界攻角，使飞机易失速
D . D、相同迎角，升力系数下降
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露天开采会导致山坡岩体的原始应力平衡状态遭到破坏。其中，露天采场边坡破坏类型不包括（）。
A.松弛张裂
B.蠕动变形
C.崩塌
D.泥石流
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纤维绳的结构主要有拧绞绳和编织绳两种，其中编织绳的长度一般为：（）
A . 100米
B . 200米
C . 220米
D . 280米
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下列哪项是指到保险公司参加车辆安全与人身安全投保产生的费用______。
A．车辆折旧
B．车辆保险费
C．车辆年检费
D．人工费用
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女性，23岁。发热、腹泻便秘交替8个月住院。发热以下午及傍晚为重，体温可达38.5℃，夜间盗汗，食欲不振，常有腹泻便秘交替。体检：消瘦，右下腹部轻度压痛。粪便镜检白细胞0－3个／HP，细菌培养3次均阴性，为明确诊断下列哪项检查最重要（）
A.胸部X线摄片
B.纤维胃镜检查
C.胃肠钡餐检查
D.旧结核菌素试验
E.血沉测定
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诺西FlexiEDGEBTS如果配置超过（）个DTRX（EXxA），则需要加系统扩展模块ESEA。
A . A、6
B . B、8
C . C、10
D . D、12
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引起假膜性结肠炎的主要机会致病菌是
A．金黄色葡萄球菌
B．大肠埃希菌
C．阴沟肠杆菌
D．艰难梭菌
E．粪肠球菌
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尿类固醇、儿茶酚胺等物质测定时，尿标本防腐应选用（）。
A.40%甲醛
B.甲苯
C.麝香草酚
D.浓盐酸
E.不需要防腐剂
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下列羧酸衍生物水解最快的是()。
A. 乙酰氯 B. 乙酸酐 C. 乙酸乙酯 D. 乙酰胺
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