根据物质吸附力不同进行分离的方法是 A．液-液萃取法 B．沉淀法 C．硅胶色谱法 D

患者，男性，40岁。因患伤寒服用氯霉素，1周后查血象发现有严重贫血和白细胞及血小板减少，这种现象发生的原因是（）

A.氯霉素破坏了红细胞

B.氯霉素缩短了红细胞的寿命

C.氯霉素抑制了线粒体整合酶的活性

D.氯霉素抑制了高尔基复合体的功能

E.氯霉素加强了吞噬细胞的功能

世界博览会，是一项由主办国政府组织或政府委托有关部门举办的有较大影响和悠久历史的国际性博览活动。参展者向世界各国展示当代的文化、科技和产业上正面影响各种生活范畴的成果。它已经历了百余年的历史，逐渐成为荟萃科学技术与产业技术的展览会，成为产业人才培育和一般市民启蒙教育不可多得的场所，但它最初是( )。

A．以纺织工业品展示为主
B．以生活日用品展示为主
C．以美术品和传统工艺品的展示为主
D．以建筑成果展示为主

Americans have become addicted to superlatives. We seem to need our regular "hyperbole fixes" as if to validate our own existence. This national syndrome becomes most egregious during the run- up to the "Super Bowl," a football game that more often than not turns out to be the "ho-hum" bowl. But to the attuned ear, this pumped-up hype routinely infects most of our conversations. This exaggeration is not the exclusive province of the magpies of sports talk. In a broader sense, some of these embellishments carry with them a subtle but undeniable element of dishonesty.
The news media is perhaps most culpable in promoting our obsession with overstatement. Consider last November’s midterm elections. Television’s political pundits portrayed the results as a "landslide victory" for Republicans and a rejection of President Obama. While it’s true that the GOP picked up 63 seats, the "massive win" becomes a slim plurality when you crunch the numbers.
Michael McDonald, a professor of politics at Virginia’s George Mason University, found that only 41 percent of eligible voters even bothered to vote in the so-called GOP landslide. And within that 41 percent, the margin of victory for House Republicans in the national popular vote was about 7 percent. Still, the media acted as though America had become a tea party nation. In reality, more Americans identify as Democrats (31 percent) than Republicans (29 percent), according to a recent Gallup survey.
Distortions like this tend to be at their most shameful during triumphs and tragedies, precisely when facts and events should be able to stand on their own without being propped up by the banalities of those paid to read a TV teleprompter. I recall during CNN’s live coverage of Pope John Paul Ⅱ’s funeral in 2005, one of my colleagues gushed in her impromptu on-air eulogy that the late pontiff was "the pope of the whole world!"
Such silly media pronouncements are so common that few of us even notice them as they float off into the ether. Yet such hyperbole is not just pompous; it also reveals considerable ignorance. My former colleague’ s remark marginalized not just the billion or so Protestants and Eastern Orthodox adherents who don’ t follow orders from Rome but also the 4 billion Muslims, Jews, Hindus, Buddhists, and others who don’t consider the pontiff worthy of such adulation and veneration. Perhaps just as embarrassing amid this verbal extravagance was the failure to note the significant Catholic dissent over his legacy. Many Roman Catholic clerics, including Jesuits, had been quite critical of John Paul Ⅱ; some were privately relieved his time at the helm was up.
"Great" and "awesome" are other examples of overused words that have become almost meaningless. Earthquakes, tsunamis, and tornados bearing down on you are awesome. Bone- crunching NFL football tackles and films like "Avatar" are not. "Awesome" is so overused it can now be rendered to mean "rather ordinary. " "Tragedy" has become another nearly meaningless word. It used to be reserved for events of mass casualties and deep suffering. Now it’s applied to stories ranging from lost puppies to quarterly earnings reports. The adage (attributed to Stalin) comes to mind: "The death of one man is a tragedy. The death of millions is a statistic. "
The real tragedy is the demise of intelligent self-expression, a consequence of our shriveling vocabularies. Well may we cringe listening to contemporary blather, especially superlatives like "unbelievable," which should properly be used to describe politicians. Sometimes this national obsession with superlatives does a genuine disservice. Wherever did we get the idea that everyone who serves in the military is a hero Heroism demands an act of valor. A retired US Navy captain I know put it best: "Heroes are selfless warriors who risk their lives and often give their lives so others may live. There are plenty of warriors and wannabes, but very few genuine heroes. " If Americans insist on anointing themselves with superlatives, they should at least strive to imitate the British, who are the true masters of exaggeration.
The late historian Barbara Tuchman was spot on: "No nation has ever produced a military history of such verbal nobility as the British’". There is no shrinking from superlatives.... Everyone is splendid: soldiers are staunch, commanders cool, the fighting magnificent. " Years later Ms. Tuchman told me nothing she ever wrote received such an overwhelmingly favorable response as that passage. But rather than imitating British hyperbole, Americans would do well to master the art of understatement and dry wit, the other speaking technique at which the British excel.
In the film "A Hard Day’s Night," John Lennon was asked by an inquiring reporter about his impressions of the United States.
"How did you find America" Lennon was asked.
"Turn left at Greenland," he replied.

In the example of "the pope of the whole world"(para. 4) from his former colleague, the author implies all of the following EXCEPT that ______.

A. other religions should also be respected
B. Roman catholic clerics could have different attitudes towards the Pope
C. this kind of praise is often meaningless and only shows one’s ignorance
D. Pope John Paul II is worthy of such adulation and veneration

胶片的空白部位与实地部位分别对应印刷品上的印刷部位与非印刷部位，则其称为（）

A、正片

B、反片

C、阳片

D、阴片

反醋酸钠晶体加到1升0.1M的醋酸溶液中，将会产生（）。

A.K平衡值增加

B.K平衡值减小

C.PH值增加