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Questions 37-40
Answer the following questions using NO MORE THAN THREE WORDS for each answer.
What did the researcher use to record Prairie Dog barks?

A.
What

【参考答案】

digital recorders
digital recorders

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Fifteen percent of US teenagers aged 12 to 17 who own mobile phones have received nude or nearly nude images of someone they know, according to a survey released on Tuesday. Only four percent of mobile phone-owning teens in that age group have sent sexually suggestive pictures of themselves, a practice known as 'sexting,' according to the Pew Research Center's Internet American Life Project.The Pew survey found that girls and boys were equally as likely to have sent a suggestive picture to another person and older teenagers were more likely to have engaged in 'sexting.' Eight percent of 17-year-olds with mobile phones have sent a sexually provocative image by text and 30 percent have received a nude or nearly nude image on their phone. Only four percent of 12-year-olds have sent suggestive images of themselves.Amanda Lenhart, a senior research specialist at Pew and the author of the report, said sexually suggestive images have become a form. of 'relationship currency' for teens. 'These images are shared as a part of or instead of sexual activity, or as a way of starting or maintaining a relationship with a significant other,' she said. 'And they are also passed along to friends for their entertainment value, as a joke or for fun.' 'The desire for risk-taking and sexual exploration during the teenage years combined with a constant connection via mobile devices creates a 'perfect storm' for sexting,' said Lenhart. 'Teenagers have always grappled with issues around sex and relationships, but their coming-of-age mistakes and transgressions have never been so easily transmitted and archived for others to see,' she added.The survey found that teens with unlimited text messaging plans were more likely to receive 'sexts' containing images of people they know. About 75 percent of mobile phone owning teens have unlimited plans. Among this group, Pew said 18 percent reporting receiving 'sexts' compared with eight percent of teens on limited data plans and three percent of teens who pay per message. According to Pew, 58 percent of 12-year-olds own a mobile phone and 83 percent teens aged 17 do.Pew noted that a number of US states are grappling with how to deal with 'sexting' among minors and some legislatures have stepped in to consider laws that would downgrade charges from felonies to misdemeanors. Pew conducted telephone interviews with 800 teens aged 12 to 17 and their parents between June 26 and September 24.What is the theme of the passage?

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听力原文：F: Good morning. Sunshine Travel Agency. How can I help you?M: Hello, this is Michael Lee, from TNG International. I'm looking for a flight to Boston. We have an account with you.F: Yes, when would you like to travel?M: At the end of the week, uh, Thursday or Friday.F: Well, I checked for another customer earlier. And the Thursday flight is full, but there is space on the flight at 17:30 this Friday, that's the 29th of October.M: Friday? Yes, that's fine. It's a direct flight, isn't it?F: Yes, it is.M: And how much is it?F: Will you be flying economy class, sir?M: No, I will be flying business. I understand we get a small discount tot long flight.F: Yes, that's right. Let's see, Hong Kong to Boston, business, return?M: Yes, return.F: Um. That comes out at $1,135.M: OK, I'd like to book that, please.F: Certainly. Let me give the booking reference.M: OK.F: It's JL3-12ZL.M: All right. Got that. Thank you very much.&8226;You will hear three telephone conversations or messages.&8226;Write one or two words or a number in the numbered spaces on the notes or forms below.&8226;You will hear each recording twice.Conversation One&8226;Look at the notes below.&8226;You wilt hear a message about a man telephoning a travel agent.

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