题干

dx等于                                              (  )

A:-2ln 2

B:2ln 2

C:-ln 2

D:ln 2

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答案(点此获取答案解析)

D

同类题1

阅读理解

    English is full of colorful phrases to describe shyness. Someone shy might be called shrinking violet or a wallflower, while for especially nervous types we have the curious expression: they wouldn't say boo to a goose.

    None of these are traditionally seen as positive descriptions, even if you like geese. In a culture of go-getting, high achievers, shy people don't come first. Or that's what the self-help industry would have you believe. Bookshops are filled with vital tomes(巨著) that promise to help beat social fears and find success in life, love and business. That is why one book, Shrinking Violets: A Field Guide to Shyness, bucks the trend. It became a sudden success across English-language media recently for its new take-on shyness.

    Author Joe Moran says that despite struggling with shyness and longing for loneliness all his life, being shy can also be "a gift". Freed from the constant urge to participate and compete in social situations, people are liberated to look at the world in new ways, and gain fresh insights.

    Indeed, many of the world's great thinkers and artists are introverts(内向的人). Scientists Charles Darwin and Albert Einstein preferred their own company; actress Keira Knightley often finds herself tongue-tied at parties; and Harry Potter author JK Rowling claims she used to be too nervous to even borrow a pen.

    Moran told BBC Future: "I think shyness probably does turn you into an amateur anthropologist(人类学家), really-you are more likely to be an observer."

    So, while extroverts make all the noise, they don't necessarily have the best ideas.

    If you're shy, you've probably known this for a long time. You just don't shout about it.

同类题4

第一节 完形填空

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

A Heroic Driver

        Larry works with Transport Drivers. Inc. One morning in 2009. Larry was 1

along 165 north after delivering to one of his    2   . suddenly, he saw a car with its bright lights on.   3    he got closer, he found 4   vehicle upside down on the road. One more look and he noticed  5 shooting out from under the 6   vehicle. Larry pulled over, set the brake and   7  the fire extinguisher (灭火器). Two good bursts from the extinguisher and the fire was put out.

      The man who had his bright lights on   8   and told Larry he had   9  an emergency call. They   10   heard a woman’s voice coming from the wrecked (毁坏的) vehicle.    11 the vehicle, they saw that a woman was trying to get out of the broken window. They told her to stay   12  until the emergency personnel arrived,   13   she thought the car was going to   14   . Larry told her that he had already put out the fire and she should not move   15   she injured her neck.

      Once fire and emergency people arrive, Larry and the other man   16    and let them go to work. Then, Larry asked the    17   if he was needed or  18   to go. They let him and the other man go.

      One thing is   19   —Larry went above and beyond the call of duty by getting so close to the burning vehicle! His    20    most likely saved the woman’s life.