题干

已知f(x)dx=56,则(  )


A:f(x)dx=28

B:f(x)dx=28

C:2f(x)dx=56

D:f(x)dx+f(x)dx=56

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D

同类题1

阅读下列短文,从每题所给的四个选项中,选出最佳选项。

    A teenager has gained a six-figure sum for a vampire (吸血鬼) novel she wrote after being inspired by the Twilight. Abigail Gibbs, 18, who started writing the book aged 14, released chapters of her novel online, where the book eventually received 17 million hits. Harper Collins in Britain has now signed this talented author following her extraordinary Internet success.

    Miss Gibbs, from Brixham, Devon, who is about to start studying English at Oxford University, is the first author to be discovered on Wattpad. Wattpad is an online library which allows subscribers (用户) to upload or read other people's stories. Miss Gibbs also said Stephenie Meyer's famous Twilight books had influenced her novel, The Dark Heroine. “I read the Twilight and did really enjoy it. At first, my parents were a bit opposed to my writing because I was staying up till 3 a.m. on school nights and they were worried that I might fall behind.”

    Miss Gibbs finished her book at the age of 16. She posted each chapter after she had written it on the Internet site, until she got to five chapters before the end when she stopped. “I had signed with an agent and he basically said, ‘Don't post anymore so as to keep the readers' anxiety”. That was tough because I disappeared in the site for a year and there were a lot of fans asking where I was. I have had so many requests from fans to upload the last five chapters; some people even said they were going to write their own endings.” Her fans can buy the e-book for £2.99, or wait for the paperback book priced at £6.99 in shops next month.

同类题3

阅读理解

    According to body language expert Robert Phipps, the way people sleep at night actually determines a lot about the type of personality they have. Phipps has identified four sleeping positions that affect personality.

    Phipps found that worriers, those who stress the most, tend to sleep in the fetal (胎儿的) position. He found that this is the most common bedtime position, with nearly 58 percent of people sleeping on their side with knees up and head down. The more we curl up (蜷曲), the more comfort we are seeking, according to Phipps.

    The second most common position is the log. Sleeping with a straight body, with arms at each side, as if they are standing guard at Buckingham Palace, indicates stubbornness, and these people (the 28 percent who sleep this way) often wake up stiffer than when they went to sleep.

    “The longer you sleep like this, the more rigid your thinking is and you can become inflexible, which means you make things harder for yourself,” according to Phipps.

    Yearner (向往) sleepers are next on the list. About 25 percent of people sleep in this style—on their side with arms stretched out in front, looking as if they are either chasing a dream or perhaps being chased themselves. Yearners are typically their own worst critics, always expecting the best results, explained Phipps. These people often wake up refreshed and eager to face the challenges of the day ahead.

    Perhaps the most peculiar (奇怪的) of sleep styles is the freefaller position. This sleep style makes up 17 percent of the population. They sleep face down with arms stretched out. These people, according to Phipps, feel like they have little control over their life. Not only is this the strangest of sleep styles, but also the least comfortable, and people may wake up feeling tired and have no energy.

    Inconclusion, Phipps has only one more thing to add: “A good night's sleep set you up for the following day and our sleeping positions can determine how we feel when we wake.”

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