问题
单项选择题 A1/A2型题
成人十二指肠全长约（）
A.5～10cm
B.10～15cm
C.15～20cm
D.20～25cm
E.30～35cm
答案
参考答案：D
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成人十二指肠全长约（）
A.5～10cm
B.10～15cm
C.15～20cm
D.20～25cm
E.30～35cm
参考答案：D
Today’s young people are taking a more active part in online activities. Although the Internet can be for students to collect information and communicate（交流）with their friends, teachers and parents are becoming more and more about the unhealthy web content（网上内容）in the bar. They think that the birth of “Harm-free Internet Bars”（健康网吧）is step to teenagers. It was Sunday afternoon and there were not many seats left in the Feiyu Internet Bar. A few were found playing . A person of the bar was walking around Internet users’ online activities. “My job is to find anyone who is looking at websites and then them from doing so,” he said. “This is a of the ‘Harm-free Internet Bar’ project”. Feiyu, a famous Internet bar in Beijing is among the first 19 to the harm-free Internet bar club. In order to help start a better for teenagers’ online activities, China’s Communist Youth League has brought out the program named “Harm-free Internet Bar for Teens”. But while teachers and parents the “harm-free Internet bars”, do many school students think of them?
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