单选题：The World Health Organization gave a warning to the public w

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题目类型：单选题
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The World Health Organization gave a warning to the public without anyWhen the virus of H1N1 hit Mexico in April,2009. A．delay
B．effort
C．schedule
D．consideration

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How do stores promote using reusable bags?

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Thegoodthingaboutchildrenisthatthey_____________ veryeasilyt

Thegoodthingaboutchildrenisthatthey_____________ veryeasilytonewenvionments.A、ad

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按照“后进先出”原则组织数据的数据结构是（　　）

按照“后进先出”原则组织数据的数据结构是（　　）A．队列 B．栈 C．双向链表 D．二叉树

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We tried to find a table for seven，hut they were all ．A.give

We tried to find a table for seven，hut they were all ．A.given awayB.kept awayC.t

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对右图二叉树进行前序遍历的结果为（　　）A．DYBEAFCZXB．YDEBFZXCAC．ABDYECFXZD．ABCDE

对右图二叉树进行前序遍历的结果为（　　）A．DYBEAFCZXB．YDEBFZXCAC．ABDYECFXZD．ABCDEFXYZ

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