问题
选择题
| 一束光线从空气斜着射向水面，入射光线跟水面的夹角为50°，则（ ） A．反射角应为50° B．折射角应为40° C．折射角应为50° D．反射角应为40° |
答案
答案：D
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| 一束光线从空气斜着射向水面，入射光线跟水面的夹角为50°，则（ ） A．反射角应为50° B．折射角应为40° C．折射角应为50° D．反射角应为40° |
答案：D
完形填空 You may not know how his magic tricks work . But that’s why they are so much fun ! American magician(魔术师) David Copperfield is coming back to China. He’s going to show everyone, young and old, ___1______ cool, new magic tricks. Copperfield is one of the world’s most famous ___2______. Copperfield’s shows begin in Beijing on April 20. He will also give shows in Changsha , Hangzhou , Nanjing and Shanghai __3________ April and May . There will be 38___4______ in all . Copperfield began studying magic when he was a child . At the ___5______ of 12 , he was the youngest person to be in the Society of American Magicians (全美魔术家协会). And now , he is famous all over the world . In 1983, he made the Statue of Liberty in New York go away ___6______ a few minutes . In 1986, he walked through the Great Wall in Beijing! His shows are not just magic. He also dances ____7_____does lots of interesting things to make his fans happy . He even asks his fans to help ____8_____ do trick! One of Copperfield’s body greatest tricks is flying . At his shows in China, he is going to make some fans fly around! How does he make people fly? No one knows .That’s his secret. In ___9______ trick, an electric saw(电锯) will cut Copperfield’s body in halt._____10_______ after the trick, he’s OK. Copperfield will also teach magic tricks to some disable(残疾) children in Chinese hospitals.
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