低位发热量

试戴时，如何判断颌位关系是否正确（）

A.患者用后牙咬合时，双侧颞部肌肉收缩明显

B.患者上下咬合时，义齿基托是否有移动、扭动

C.患者张口时，上颌义齿是否有脱落

D.患者卷舌后，下颌是否还能后退

E.患者后牙咬合时，是否偏向一侧

下列说法中，正确的是（　　）

A．要想了解NBA各球队在2008赛季的比赛结果，应采用抽样调查

B．某奶粉工厂质检人员检测奶粉是否具有“三聚氰胺”，应采用全面调查的方法

C．要了解某小组各学生某次数学测试成绩，应采用抽样调查法

D．了解某市中学生的身体素质状况，应采用抽样调查法

呼吸功能不全的主要表现是（）。

A.稍微运动后就发生呼吸困难

B.稍微运动后就发生紫绀

C.经常出现轻度紫绀

D.经常出现哮喘

E.反复出现呼吸性酸中毒

学校文化建设有多个落脚点，其中课堂教学是学校文化建设的主渠道。在课堂教学中，教师必须注意加强学校文化和学科文化建设。这主要有利于落实课程三维课程目标中的（）

A.知识与技能目标

B.过程与方法目标

C.情感态度与价值观目标

D.课堂教学目标

When Newsweek recently asked 1,000 U. S. citizens to take America’s official citizenship test, 29 percent couldn’t name the vice president. Seventy-three percent couldn’t correctly say why we fought the Cold War. Forty-four percent were unable to define the Bill of Rights. And 6 percent couldn’t even circle Independence Day on a calendar.

Don’t get us wrong: civic ignorance is nothing new. For as long as they’ve existed, Americans have been misunderstanding checks and balances and misidentifying their senators. And they’ve been lamenting the ignorance of their peers ever since pollsters started publishing these dispiriting surveys back in Harry Truman’s day. According to a study by Michael X. Delli Carpini, dean of the Annenberg School for Communication, the yearly shifts in civic knowledge since World War II have averaged out to "slightly under 1 percent. "

But the world has changed. And unfortunately, it’s becoming more and more inhospitable to incurious know-nothings—like us. To appreciate the risks involved, it’s important to understand where American ignorance comes from. In March 2009, the European Journal of Communication asked citizens of Britain, Denmark, Finland, and the U.S. to answer questions on international affairs. The Europeans outdid us. It was only the latest in a series of polls that have shown us lagging behind our First World peers.

Most experts agree that the relative complexity of the U. S. political system makes it hard for Americans to keep up. In many European countries, parliaments have proportional representation, and the majority party rules without having to "share power with a lot of subnational governments," notes Yale political scientist Jacob Hacker. In contrast, we’re saddled with a nonproportional Senate; a tangle of state, local, and federal bureaucracies; and near-constant elections for every imaginable office (judge, sheriff, school-board member, and so on). "Nobody is competent to understand it all, which you realize every time you vote," says Michael Schudson, author of The Good Citizen. "You know you’re going to come up short, and that discourages you from learning more. "

It doesn’t help that the United States has one of the highest levels of income inequality in the developed world, with the top 400 households raking in more money than the bottom 60 percent combined. As Dalton Conley, an NYU sociologist, explains, "it’s like comparing apples and oranges. Unlike Denmark, we have a lot of very poor people without access to good education, and a huge immigrant population that doesn’t even speak English. " When surveys focus on well-off, native-born respondents, the U. S. actually holds its own against Europe.

For more than two centuries, Americans have gotten away with not knowing much about the world around them. But times have changed—and they’ve changed in ways that make civic ignorance a big problem going forward. We suffer from a lack of information rather than a lack of ability. Whether that’s a treatable affliction or a terminal illness remains to be seen. But now’s the time to start searching for a cure.

Jacob Hacker implies that the British political system（）

A. is much less complicated than that of America

B. is more centralized in terms of power and government

C. is less democratic and ignores a lot of civil rights

D. is less bureaucratic and works more efficiently