更多“以太网网段中的主机发生冲突时，为何要在尝试传输帧之前随机延迟”相关的问题
18岁男性患者，20天前四肢进行性无力，检查见四肢迟缓性瘫痪，腱反射消失，感觉正常，腰椎穿刺点取髂后上棘连线与后正中线交会处，此处相当于（）。
A.腰椎1～2棘突间隙
B.腰椎2～3棘突间隙
C.腰椎3～4棘突间隙
D.腰椎4～5棘突间隙
E.腰椎5～骶1棘突间隙
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A great deal of attention is being paid today to the so called digital divide--the division of the world into the info (information) rich and the info poor. And that divide does exist today. My wife and I lectured about this looming danger twenty years ago. What was less visible then, however, were the new, positive forces that work against the digital divide. There are reasons to be optimistic. There are technological reasons to hope the digital divide will narrow. As the Internet becomes more and more commercialized, it is in the interest of business to universalize access --after all, the more people online, the more potential customers there are. More and more governments, afraid their countries will be left behind, want to spread Internet access. Within the next decade or two, one to two billion people on the planet will be netted together. As a result, I now believe the digital divide will narrow rather than widen in the years ahead. And that is very good news because the Internet may well be the most powerful tool for combating world poverty that we’ve ever had. Of course, the use of the Internet isn’t the only way to defeat poverty. And the Internet is not the only tool we have. But it has enormous potential. To take advantage of this tool, some impoverished countries will have to get over their outdated anti-colonial prejudices with respect to foreign investment. Countries that still think foreign investment is an invasion of their sovereignty might well study the history of infrastructure (the basic structural foundations of a society) in the United States. When the United States built its industrial infrastructure, it didn’t have the capital to do so. And that is why America’s Second Wave infrastructure--including roads, harbors, highways, ports and so on--were built with foreign investment. The English, the Germans, the Dutch and the French were investing in Britain’s former colony. They financed them. Immigrant Americans built them. Guess who owns them now The Americans. I believe the same thing would be true in places like Brazil or anywhere else for that matter. The more foreign capital you have helping you build your Third Wave infrastructure, which today is an electronic infrastructure, the better of you’re going to be. That doesn’t mean lying down and becoming fooled, or letting foreign corporations run uncontrolled. But it does mean recognizing how important they can be in building the energy and telecom infrastructures needed to take full advantage of the Internet.
A．offers economic potentials.B．can bring foreign funds.C．can soon wipe out world poverty.D．connects people all over the worl
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地下排水设备中不包含（）。
A.天沟 B.明沟与槽沟 C.渗沟 D.渗水渗洞和渗井
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肝细胞胞浆内嗜酸性小体（）
A．细胞水肿
B．脂质沉积
C．结缔组织玻璃样变
D．血管壁玻璃样变
E．细胞内玻璃样变
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制种田块为了生产合格种子，前作应该不存在（)情况，才能生产上有保障。①病虫害②同种的其他品种的混杂③其他类似植物种的混杂④杂草种子⑤绿肥作物种子混杂
A.①+②+③+⑤
B.①+③+④+⑤
C.②+③+④+⑤
D.①+②+③+④
E.①+②+③+④+⑤
F.F.①+④+⑤
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小学生创造力辅导措施有哪些?
A.重视创造性思维的培养
B.培养小学生的创造意识，鼓励创造性的学习，发挥其主观能动性
C.尊重儿童个性，培养创造人格
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有关防磨套使用正确的说法是（）
A.两趟钻检查一次
B.防磨套壁厚偏磨50%时应更换
C.一趟钻超过15天的，应在20天内取出检查
D.对于安装95/8”套管头的应使用加长防磨套
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以下过程竣工文件（）需要施工单位、监理单位、建设单位、城建档案馆全部归档保存。
A.住宅质量保证书
B.房屋建筑工程质量保修书
C.工程竣工总结
D.建设工程竣工验收备案表
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下列属于犯罪嫌疑人、被告人供述和辩解的有（）。
A.原告陈述
B.被告人攀供
C.犯罪嫌疑人狡辩
D.被告认罪
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马克思分析社会资本的再生产和流通，运用了两个基本理论前提，这就是（）。
A.社会总产品从价值上分为三个部分，即C、ｖ、ｍ B.社会生产分为两大部类 C.以社会总商品资本作为出发点D．既包括价值补偿，又包括物质替换 D.资本主义再生产的特征是扩大再生产
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对空调机组中的风机描述正确的是（）
A.离心风机
B.轴流风机
C.斜流风机
D.叶片为后倾曲面
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根据下图中的主视图和俯视图,选择正确的左视图为________
A. 选A B. 选B C. 选C D. 选D
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短型的脸型宣选择（）镜框，以提高眉线。
A.无边
B.透明边
C.深色边
D.宽边
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