读“北半球中纬度某地连续三天的天气状况示意图”，下列叙述正确的是（ ）
A．10月4日平均气温最高
B．10月5日昼夜温差最大
C．10月6日最易出现霜冻
D．10月5日恰逢台风过境
答案：B
题目分析：图示4日，昼夜皆阴，白天多云，云层对太阳辐射的削弱作用强，故白天气温较低，晚上多云，大气逆辐射强，气温不低；5日昼夜皆晴，云少，则白天大气对太阳辐射的削弱作用弱，故白天气温较高，晚上少云，大气逆辐射弱，气温较低；故昼夜温差最大，B项正确。6日，白天晴天，气温高，晚上阴天，气温不低，故平均气温最高。
点评：本题解题的关键是掌握大气的热力作用原理，利用白天大气的削弱作用和晚上的保温效应解释不同天气状况下的气温高低，难度一般。
| A federal judge on Monday certified a $200 billion class action lawsuit against the tobacco industry for its marketing of light cigarettes. Eastern District of New York Judge Jack B. Weinstein’s 540-page opinion in Schwab v. Philip Morris USA, Inc., 04-CIV-1945—which included an additional 965 pages of appendices for a total of 1,505 pages—gave tens of millions of smokers an avenue to recover damages from the nation’s largest tobacco companies, including Philip Morris USA Inc., R.J. Reynolds Tobacco Co., Lorillard Tobacco Co., and Liggett Group, Inc. The class will include anyone who purchased light cigarettes from the time tobacco companies began selling them in the 1970s. The judge said he even would consider broadening the class, to encompass smokers of all "low tar" brands, not just light cigarettes. The judge suggested that an expansion of the class could assist the parties in negotiating a global settlement. He set a trial date for January 22, 2007. The plaintiffs intend to seek treble damages. einstein has expressed skepticism about the plaintiffs’ theory of damages, which alleges that light smokers were defrauded of billions because they believed they were buying a product of greater value because of its health advantages. The judge also questioned the size of the class, as well as the claim that as many as 90 percent of light cigarette smokers chose the cigarettes because they were less harmful. In his ruling Monday, the judge stressed that while the suit was far from perfect, the evidence was sufficient. He said the jury system—which he described as the "ultimate focus group of the law"—was well equipped to sort out the particulars in accordance with Amendment Ⅶ of the U.S. Constitution. Weinstein declined to grant an interlocutory appeal to the 2nd U.S. Circuit Court of Appeals. Theodore M. Grossman of Jones Day in Cleveland, which represents R.J. Reynolds, said the defendants would seek a stay and appeal the class certification under Rule 23(f)of the Federal Rules of Civil Procedure. |
The phrase "a global settlement" underlined in Paragraph 3 refers to ______ .
A．smokers are found everywhere on the globe
B．smokers are to settle down around the world
C．people around the earth smoke light cigarettes
D．a final court decision that applies internationally