There is no direct flight, so I flew to Pittsburgh ______ Philadelphi A: A. amidB. viaC. acrossD. past

The Battle of _____ was the turning point of the American Civil War. BA. B. C. A: Bull Run B: Gettysburg C: Richmond D: Pittsburgh

Los Angeles is to California as______. () A: Houston is to Texas B: Phoenix is to New Mexico C: state is to country D: Philadelphia is to Pittsburgh E: Denver is to America

全球第一个循证护理中心成立于（ ） A: 英国Oxford大学 B: 美国Pittsburgh大学 C: 澳大利亚Adelaide大学 D: 加拿大McMaster大学 E: 英国York大学

全球第一个循证护理中心成立于（ ） A: 英国的York大学 B: 澳大利亚的Adelaide大学 C: 美国的Pittsburgh大学 D: 加拿大的McMaster大学

12全球第一个循证护理中心成立于 A: 英国Oxford大学 B: 美国Pittsburgh大学 C: 澳大利亚Adelaide大学 D: 英国York大学 E: E加拿大McMaster大学

Prof. Hoffmann tells us that when he studiedat Harvard University, he was told that itwas never intended to be an international university,and most of the people who went to Harvard in the 19th and early 20th century were from _______________. A: Boston, Massachusetts B: Providence, Rhode Island C: Richmond, Virginia D: Pittsburgh, Pennsylvania

Caroline was hoping to make her [color=#ff3853]marital[/color] home in Pittsburgh to be near her family.  A: adj. 死的；不运转的 B: adj. 婚姻的 C: adj. 典型的；经典的 未知类型：{'label': 'source', 'content': '柯林斯词典', 'isMemberControl': 0, 'type': 181}

Could you reproduce Silicon Valley elsewhere, or is there something unique about it? It wouldn’t besurprising if it were hard to reproduce in other countries, because youcouldn’t reproduce it in most of the US either. What does it take to make aSilicon Valley? It’s the rightpeople. If you could get the right ten thousand people to move from SiliconValley to Buffalo, Buffalo would become Silicon Valley. You only needtwo kinds of people to create a technology hub （中心）:rich people and nerds （痴迷科研的人）. Observationbears this out. Within the US, towns have become startup hubs if and only ifthey have both rich people and nerds. Few startups happen in Miami, forexample, because although it’s full of rich people, it has few nerds. It’s notthe kind of place nerds like. WhereasPittsburg has the opposite problem: plenty of nerds, but no rich people. Thetop US Computer Science departments are said to be MIT, Stanford, Berkeley, andCarnegie-Mellon. MIT yielded Route 128. Stanford and Berkeley yielded SiliconValley. But what did Carnegie-Mellon yield in Pittsburgh? And whathappened in Ithaca, home of Cornell University, which is also high on the list. I grew up inPittsburgh and went to college at Cornell, so I can answer for both. Theweather is terrible, particularly in winter, and there’s no interesting oldcity to make up for it, as there is in Boston. Rich people don’t want to livein Pittsburgh or Ithaca. So while there are plenty of hackers （电脑迷）who could start startups, there’s no one to invest in them. Do you reallyneed the rich people? Wouldn’t it work to have the government invest the nerds?No, it would not. Startup investors are a distinct type of rich people. Theytend to have a lot of experience themselves in the technology business. Thishelps them pick the right startups, and means they can supply advice andconnections as well as money. And the fact that they have a personal stake inthe outcome makes them really pay attention. What do we learn about Silicon Valley from the passage? A: It leads the world in information technology. B: Its success is hard to copy any where else. C: It is the biggest technology hub in the U D: Its fame in high technology is incomparable.

Why do smokers tend to weigh less than nonsmokers and gain weight when they give up the habit? Contrary to “common knowledge”, nonsmokers do not generally eat more than smokers, nor do they exercise less, studies find. Research performed on smokers at rest indicates that nicotine (尼古丁) itself can increase basal metabolic (新陈代谢的) rates, meaning smokers burn more energy than nonsmokers during periods of inactivity. But surveys suggest most smokers smoke not while completely at rest, but while performing light activities such as desk work that can increase metabolic rates by two or three times. Unless nicotine’s metabolic effects increase proportionally with metabolic rates, its influence on weight might be insignificant. Now a study shows that nicotine’s effects on body-fuel consumption indeed increase proportionally with increases in activity. “These results indicate that the metabolic effect of nicotine may play a greater part in accounting for body-weight differences between smokers and nonsmokers than was previously believed,” says Kenneth A. Perkins and his colleagues at the University of Pittsburgh School of Medicine. The researchers gave a nicotine nose spray to individuals performing light work — in this case riding an exercise bicycle modified to allow easy riding while subjects remain seated in a comfortable armchair. The activity raised resting metabolic rates two to three times. By analyzing air breathed out, the researchers calculated energy consumption in the armchair bicyclists before and after giving the nose spray and compared the relative changes with subjects in the control group given placebo (（试验药物用的）无效对照剂) nose sprays. Relative to their baseline bicycle expenditures, individuals in the nicotine group expended considerably more energy than did those in control group while doing the same amount of work. With nicotine, Perkins says, “It’s as if the body is becoming much less efficient in using its stored energy.” While the results may seem discouraging to smokers who’d like to quit without gaining weight, Perkins notes that walking an extra mile a day should make up for the difference in metabolic efficiency. And he says smokers would have to gain “well more than 50 pounds” to counterbalance the health risks of continued smoking.