在由数字1，2，3，4，5组成的所有没有重复数字的5位数中，大于23145且小于43521的数共有（）。

A、56个

B、57个

C、58个

D、60个

求证：.

Passage2Come on-Everybody's doing it. That whispered message，half invitation and half forcing，is what most of us think of when we hear the words peer pressure. It usually leads to no good-drinking，drugs and casual sex. But in her new book Join the Club，Tina Rosenberg contends that peer pressure can also be a positive force through what she calls the social cure，in which organizations and officials use the power of group dynamics to help individuals improve their lives and possibly the word.Rosenberg，the recipient of a Pulitzer Prize，offers a host of examples of the social cure inaction: In South Carolina, a state-sponsored antismoking program called Rage Against the Haze sets out to make cigaretes  uncool. In South Africa, an HIV-prevention initiative known as loveLife recruits young people to promote safe sex among their peers.The idea seems promising, and Rosenberg is a perceptive observer. Her critique of the lameness of many public-health campaigns is spot-on: they fail to mobilize per pressure for healthy habits, and they demonstrate a seriously flawed understanding of psychology."Dare to be different, please don't smoke!" pleads one billboard campaign aimed at reducing smoking among teenagers-teenagers, who desire nothing more than fitting in. Rosenberg argues convincingly that public-health advocates ought to take a page from advertisers, so skilled at applying peer pressure.But on the general effectiveness of the social cure, Rosenberg is less persuasive. Join the Club is filled with too much irrelevant detail and not enough exploration of the social and biological factors that make peer pressure so powerful. The most glaring flaw of the social cure as its presented here is that it doesn't work very well for very long. Rage Against the Haze failed once state funding was cut. Evidence that the loveLife program produces lasting changes is limited and mixed.There's no doubt that our peer groups exert enormous influence on our behavior. An emerging body of research shows that positive health habits-as well as negative ones-spread through networks of friends via social communication. This is a subtle form of peer pressure: we unconsciously imitate the behavior we see every day.Far less certain, however, is how successfully experts and bureaucrats can select our peer groups and steer their activities in virtuous directions. It's like the teacher who breaks up the troublemakers in the back row by pairing them with better-behaved classmates. The tactic never really works. And that's the problem with a social cure engineered from the outside: in the real world, as in school, we insist on choosing our own friends.The author suggests in the last paragraph that the effect of peer pressure is________.

A、harmful

B、desirable

C、profound

D、questionable

Sante fe, New Mexico multimillionaire Fortest Fenn has always loved a good adventure.As a small child before eight, he and his brother, Skippy spent summer vacations making exploration in Yellowstone National Park. As a teen, Fenn idolized the decorated World War n fighter pilot, called Robin Olds and latter emulated his hero during The Vietnam War as an Air fighte.pilot to go to New Mexico and settled there as an arts and antiques dealer, hunting down valuable paintings, rugs, war memorabilia, and other antique to sell. In 1998, Fenn was diagnosecl with terminal kidney cancer.As he had always been doing, he conceived a grand adventured that he assumed would be his last one."I wanted to create some excitement, some hope, before I died," says Fenn, 82, adding that he also wanted to"get kids out of the game room and off the couch." With those ideas in his mind, he started to devise a treasurehunt. Little by little, Fenn began stocking a small bronze chest with gold coins, prehistoric bracelets and other valuable things.When his cancer went into remission in 1993, he decided he would carryout his plan anyway. In 2010, Fenn the chest with jewels and valuable stones and hid it somewhere deep in the Rocky Mountains, north of Sante Fe.Later that year, he wrote a poem for his self-published memoir, The Thrill of the Chase.It contained nine clues about the treasure box's whereabouts.One stanza reads like this: Begin it where warm waters halt/And take it in the canyon down/Not far, but too far to walk/Put in below the home of Brown. A few months later, a story about the treasure appeared in a magazine.Since then, Fenn has received thousands of e-mails from treasure hunters.Some request more clues to the box.But mostly "people thanked me for bringing their family together," he says with a self-comforting smile on his face. In April, Fenn told a crowd at an Albuquerque bookstore that two groups of treasure hunters had gotten within 500 feet of the chest."They walked right by it," he said. Fenn is confident that the treasure will be unearthed eventually and says it will take the right combination of cunning and perseverance."It will be discovered by someone who has read the clues carefully and successfully.But nobody is going to happen upon it," he predicts. He hopes that whoever finds the loot will relish the riches and the adventure of finding them.Which of the following is closest in meaning to the underlined phrase"topped off" in PARAGRAPH FIVE?

A、 Filled.

B、 Covered.

C、 Fixed.

D、 Decorated.

根据给出的文字材料可以推出的是（　　）。①2008年我国耕地面积②2005～2008年我国新增建设用地面积的总和③2005～2008年我国因农业结构调整减少的耕地面积

A、①

B、②和③

C、①、②和③

D、均推不出来

目前国家的宏观调控基本实现了由直接调控向间接调控转变。（　　）

A、对

B、错