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安全色由红色、黄色、蓝色、绿色四种颜色组成。红色表示 、 ;黄色表示 、 ;蓝色表示 ;绿色表示通行、 和 。(21分)
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【简答题】Americans eat________ vegetable per person today as they did in 1910. A. more than twice B. as twice as many C. twice as many as D. twice as much 2. Paper producedevery year is _______ the world's pro...
【简答题】A. You're welcome. B.Can I speak to Wang Hao? C.I'll tell him. D.This is his mother speaking. E.May I take a message? A:Hello! B:Hello!This is Tom. ____________6_____________ A: ________7_________Wang...
【简答题】听下面一段材料, 回答第1、2题. 1. How many times has the man been to Mexico City? A. Once. B. Twice. C. Three times. 2. What did the woman do yesterday? A. She visited a museum. B. She saw a film. C. She went swim...
【简答题】Please tell him to ring me as soon as possible. ( 2-8)
【简答题】常用的招标方式有（）和（）两种形式.
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