已知A={x∈R|x2+2x+p=0}且A∩{x∈R|x>0}=∅,求实数p的取

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问题:

已知A={x∈R|x2+2x+p=0}且A∩{x∈R|x>0}=∅,求实数p的取值范围.

考点:集合间交、并、补的运算(用Venn图表示)
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May I have you attention please? I have few things to tell you. When you have class here in the language lab, please be here a little early. Change your shoes before enter the lab. Don’t bring anything here except your text books. When you are into, please don’t touch these machine without permission. Always do as the teacher tell you to. In class you should only speak the English, not Chinese. Recorders can be used make a copy of the listening materials. When class over, turn off your machines and leave the lab one by one.

That’s all. Thank you.

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某居民企业2011年转让技术所有权收入是2500万元,相关的成本、费用、税金、损失是1775万元,已知该企业无其他纳税调整事项。该企业应缴纳的企业所得税是()万元。

A.28.125

B.56.25

C.90.63

D.181.25

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开发Web站点不需进行规划,直接用站点开发工具编制就可以。

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视网膜浅层出血为________出血,位于________层。

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将APU电门移到OFF位()

A、120秒后将自动关车

B、燃油活门和进气门仍保留在开位

C、在无引气负载的情况下,关车前推荐的1分钟延迟时间将省略

D、关闭APU发电机,关闭APU引气活门并使APU GENOFF BUS灯灭

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