若☉O:x2+y2=5与☉O1:(x-m)2+y2=20(m∈R)相交于A,B两

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问题:

若☉O:x2+y2=5与☉O1:(x-m)2+y2=20(m∈R)相交于A,B两点,且两圆在点A处的切线互相垂直,则线段AB的长是   .

考点:圆的标准方程与一般方程
题型:填空题

对反应:3Cl2+6KOH═5KCl+KClO3+3H2O,以下说法中正确的是(  )

A.Cl2是氧化剂,KOH是还原剂

B.氧化剂质量是还原剂质量的5倍

C.氧化产物与还原产物的物质的量之比为5:1

D.反应过程中3molCl2共转移6mol电子

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根据行政复议法的规定,下列关于行政复议机关的哪些说法是正确的

A.对县人民政府的具体行政行为不服的,向该县人民政府申请行政复议

B.对市级人民政府的具体行政行为不服的,向上一级人民政府申请行政复议

C.对省人民政府工作部门的具体行政行为不服的,向该省人民政府申请行政复议

D.对国务院部门的具体行政行为不服的,向国务院申请行政复议

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图3中甲地所在的国家,农业以畜牧业为主,财政收入主要来源于货物过境和港口服务业。

该城市发展成为该国首都的优势条件是()

A.位置适中

B.资源丰富

C.气候宜人

D.经济中心

题型:填空题

从长期偿债能力来讲,有形资产净值债务率越低越好。( )

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Part of the debate about culture revolves around issues of perspective and ownership. Within a nation such (1) the United States—a nation whose cultural heritage includes elements from every corner of the world (2) are a great many perspectives coexisting and intertwining in the cultural fabriC.When we all ask (3) as individuals, "what belongs to me, to my culture " we are rewarded with a spectacular variety of (4) ; in this way, different perspectives and ownership of different cultural traditions enriches everyone. But when we ask " (5) belongs to us, to our culture " we ask a much harder question. Do the people of the (6) States, or of any culturally complex human society, necessarily share common cultural elements If so, who gets (7) decide what those elements are
This debate is a crucial one in many cultures throughout the world (8) . In the US, the debate promises to impact the way we educate our children—that is, (9) manner and shape in which culture reproduces itself—and the way we write our laws. In (10) countries, equally crucial issues are at stake.
For many people, what is at stake is the character (11) US national identity. Hirsch argues that this identity needs to become less culturally fragmented; others, like Walker, (12) that the national character gets its strength from cultural diversity, from the freedom (at home and in (13) ) to celebrate, honor, and reproduce different cultural traditions. Those who take this latter view follow the reasoning (14) Shweder, arguing that we need to accept that there are multiple valid cultural perspectives and that two (15) perspectives can both be valid even though they might contradict one another.
Recognize that the position you (16) in this debate about culture—whatever position you take—is a political one with implications (17) what we should value, what we should praise, what we should accept, what we should teach. When (18) reflect on this debate, when you contribute your own voice to the discussion, try to be (19) of the implications that follow from your position. When you listen to the voices of others, try to (20) with awareness, deciding for yourself what is at stake and how their positions relate to your own.

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