In which of the following activities does the teacher mainly play the role of a Controller？
A、Organizing the students to do activities by giving instruction.
B、Changing the pace of the class by various means.
C、Correcting mistakes and organizing feedback.
D、Introducing a new grammar point.
相关问题推荐
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一台显微镜目镜为10x，物镜为10x，在此放大倍数下可以看到整个视野中的64个细胞，如果将物镜改为40x，理论上可以看到多少个细胞？（）
A、32
B、8
C、2
D、4
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Passage 2Americans don't like to lose wars. Of course,a lot depends on how you define just what a war is. There are shooting wars-the kind that test patriotism and courage-and those are the kind at which the U.S. excels. But other struggles test those qualities too. What else was the Great Depression or the space race or the construction of the railroads? If American indulge in a bit of flag-when the job is done, they earned it.Now there is a similar challenge-global warming. The steady deterioration of the very climate of this very planet is becoming a war of the first order, and by any measure, the U.S. is losing. Indeed, if America is fighting at all, it's fighting on the wrong side. The U.S. produces nearly a quarter of the world's greenhouse gases each year and has stubbornly made it clear that it doesn't intend to do a whole lot about it. Although 174 nations approved the admittedly flawed Kyoto accords to reduce carbon levels, the U.S. walked away from them. There are vague promises of manufacturing fuel from herbs or powering cars with hydrogen. But for a country that tightly citespatriotism as one of its core values, the U.S. is taking a pass on what might be the most patriotic struggle of all. It's hard to imagine a bigger fight than one for the survival of a country's coasts and farms, the health of its people and stability of its economy.The rub is, if the vast majority of people increasingly agree that climate change is a global emergency, there's far less agreement on how to fix it. Industry offers its plans, which too often would fix little. Environmentalists offer theirs, which too often amount to native wish lists that could weaken America's growth. But let's assume that those interested parties and others will always bent the table and will always demand that their voices be heard and that their needs be addressed. What would an aggressive, ambitious, effective plan look like-one that would leave the U.S. both environmentally safe and economically sound?Halting climate change will be far harder. One of the more conservative plans for addressing the problem calls for a reduction of 25 billion tons of carbon emissions over the next 52 years. And yet by devising a consistent strategy that mixes short-time profit with long-range objective and blends pragmatism with ambition, the U.S. can, without major damage to the economy, help halt the worst effects of climate change and ensure the survival of its way of life for future generations. Money will do some of the work, but what's needed most is will."I'm not saying the challenge isn't almost overwhelming,"says Fred Krupp."But this is America, and America has risen to these challenges before."What does the passage mainly discuss？
A、Human wars.
B、Economic crisis.
C、America's environmental policies.
D、Global environment in general.
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美术课程是高中课程体系中的（）课。
A、必修
B、选修
C、基础
D、技能
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Passage2Americans today don't place a very high value on intellect.Our heroes are athletes，entertainers，and entrepreneurs，not scholars.Even our schools are where we send our children to get a practical education-not to pursue knowledge for the sake of knowledge.Symptoms of pervasive anti-intellectualism in our schools aren't difficult to find.“Schools have always been in a society where practical is more important than intellectual，"says education writer Diane Ravitch."Schools could be a counterbalance."Ravitch's latest book，Left Back:A Century of Failed School Reforms，traces the roots of anti-intellectualism in our schools，concluding they are anything but a counterbalance to the American distaste for intellectual pursuits.But they could and should be. Encouraging kids to reject the life of the mind leaves them vulnerable to exploitation and control. Without the ability to think critically, to defend their ideas and understand the ideas of others, they cannot fully participate in our democracy. Continuing along this path, says writer Earl Shorris,"We will become a second-rate country. We will have a less civil society.""Intellect is resented as a form of power or privilege,"writes historian and professor Richard Hofstadter in Anti-Intellectualism in American Life,a Pulitzer-Prize winning book on the roots of anti-intellectualism in US politics, religion, and education. From the beginning of our history, says Hofstadter, our democratic and populist urges have driven us to reject anything that smells of elitism. Practicality, common sense, and native intelligence have been considered more noble qualities than anything you could learn from a book.Ralph Waldo Emerson and other Transcendentalist philosophers thought schooling and rigorous book learning put unnatural restraints on children:"We are shut up in schools and college recitation rooms for 10 or 15 years and come out at last with a bellyful of words and do not know a thing."Mark Twain's Huckleberry Finn exemplified American anti-intellectualism. Its hero avoids being civilized-going to school and learning to read-so he can preserve his innate goodness.Intellect, according to Hofstadter, is different from native intelligence,a quality we reluctantly admire. Intellect is the critical, creative, and contemplative side of the mind. Intelligence seeks to grasp, manipulate, re-order, and adjust, while intellect examines, ponders, wonders, theorizes, criticizes and imagines.School remains a place where intellect is mistrusted. Hofstadter says our country's educational system is in the grips of people who "joyfully and militantly proclaim their hostility to intellect and their eagerness to identify with children who show the least intellectual promise."We can learn from the text that Americans have a history of________.
A、undervaluing intellectualism
B、favoring intellectualism
C、supporting school reform
D、suppressing native intelligence
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Passage 1First two hours, now three hours-this is how far in advance authorities are recommending people show up to catch a domestic flight, at least at some major U.S. airports with increasingly massive security lines.Americans are willing to tolerate time-consuming security procedures in return for increased safety. The crash of EgyptAir Flight 804, which terrorists may have downed over the Mediterranean Sea, provides another tragic reminder of why. But demanding too much of air travelers or providing too little security in return undermines public support for the process. And it should: Wasted time is a drag on Americans' economic and private lives, not to mention infuriating.Last year, the Transportation Security Administration (TSA) found in a secret check that undercover investigators were able to sneak weapons-both fake and real-past airport security nearly every time they tried. Enhanced security measures since then, combined with a rise in airline travel due to the improving economy and low oil prices, have resulted in long waits at major airports such as Chicago's O' Hare International. It is not yet clear how much more effective airline security has become-but the lines are obvious.Part of the issue is that the government did not anticipate the steep increase in airline travel, so the TSA is now rushing to get new screeners on the line. Part of the issue is that airports have only so much room for screening lanes. Another factor may be that more people are trying to overpack their carry-on bags to avoid checked-baggage fees, though the airlines strongly dispute this.There is one step the TSA could take that would not require remodeling airports or rushing to hire: Enroll more people in the PreCheck program. PreCheck is supposed to be a win-win for travelers and the TSA. Passengers who pass a background check are eligible to use expedited screening lanes. This allows the TSA to focus on travelers who are higher risk, saving time for everyone involved. The TSA wants to enroll 25 million people in PreCheck.It has not gotten anywhere close to that, and one big reason is sticker shock: Passengers must pay S85 every five years to process their background checks. Since the beginning, this price tag has been PreCheck's fatal flaw. Upcoming reforms might bring the price to a more reasonable level. But Congress should look into doing so directly, by helping to finance PreCheck enrollment or to cut costs in other ways.The TSA cannot continue diverting resources into underused PreCheck lanes while most of the traveling public suffers in unnecessary lines. It is long past time to make the program work.Which of the following contributes to long waits at major airports?
A、New restrictions on carry-on bags.
B、The declining efficiency of the TSA.
C、An increase in the number of travelers.
D、Frequent unexpected secret checks.