更多“物联网的网络架构由哪三层组成?分别是什么?”相关的问题
下述哪一种钙化不是错构瘤的典型钙（）.
A．爆米花样
B．层状
C．靶心
D．均匀一致钙化，CT值＞200HU
E．偏心性沙粒样
点击查看答案
中国体育博物馆正式开馆是在哪一年？（）
A.1989
B.1990
C.1991
D.1992
点击查看答案
果酱样便可见于（）
A.细菌性痢疾
B.阿米巴痢疾
C.肛裂
D.直肠癌
E.痔疮
点击查看答案
A . 280nmB . 250nmC . 220nmD . 260nm
点击查看答案
按照《国家基本公共卫生服务规范（第三版）》要求，居民健康档案有动态记录的档案是指有医疗记录和（或）公共卫生服务记录。（）
点击查看答案
开发间接费用账户的作用、性质与工业企业的（）账户类似。
A.生产成本B.主营业务成本C.管理费用D.制造费用
点击查看答案
繁忙干线封锁正线180分钟及以上、影响全站（全场）信联闭240分钟及以上的施工计划由（）审批。
A.铁道部
B.铁路局
C.车务段
点击查看答案
薪酬设计中（）环节有利于解决内部公平。
A.市场薪酬调查 B.支付范围内的薪酬标准 C.职位评价 D.工作分析
点击查看答案
在评剧发展的初期，农民剧作家（）曾为评剧编写了近百个剧目，如当时在北方群众中轰动一时的（）
点击查看答案
New observations about the age of some globular clusters in our Milky Way galaxy have cast doubt on a long-held theory about how the galaxy was formed. The Milky Way contains about 125 globular clusters (compact groups of anywhere from several tens of thousands to perhaps a million stars) distributed in a roughly spherical halo around the galactic nucleus. The stars in these clusters are believed to have been born during the formation of the galaxy, and so may be considered relics of the original galactic nebula, holding vital clues to the way of the formation took place.The conventional theory of the formation of the galaxy contends that roughly 12 to 13 billion years ago the Milky Way formed over a relatively short time (about 200 million years) when a spherical cloud of gas collapsed under the pressure of its own gravity into a disc surrounded by a halo. Such a rapid formation of the galaxy would mean that all stars in the halo should be very nearly the same age.However, the astronomer Michael Bolte has found considerable variation in the ages of globular clusters. One of the clusters studied by Bolte is 2 billions years older than most other clusters in the galaxy, while another is 2 billion years younger. A colleague of Bolte contends that the cluster called Palomar 12 is 5 billion years younger than most other globular clusters.To explain the age differences among the globular clusters, astronomers are taking a second look at “renegade” theories. One such newly fashionable theory, first put forward by Richard Larson in the early 1970’s, argues that the halo of the Milky Way formed over a period of a billion or more years as hundreds of small gas clouds drifted about, collided, lost orbital energy, and finally collapsed into a centrally condensed elliptical system. Larson’s conception of a “lumpy and turbulent” protogalaxy is complemented by computer modeling done in the 1970’s by mathematician Alan Toomre, which suggests that closely interacting spiral galaxies could lose enough orbital energy to merge into a single galaxy.The passage is primarily concerned with discussing______
A.B.C.D.TheE.theF.recentG.currentH.theI.the
点击查看答案
慢性阻塞性肺病患者的临床症状有（)。
A．咳嗽
B．咳痰
C．气短
D．无症状
点击查看答案
社会保障基金的投资方向包括（）。
A.银行存款
B.国债
C.股票
D.基础设施建设
点击查看答案
九寨沟的六绝包括（）。
A.翠海
B.石林
C.高山
D.丛林
点击查看答案
题目内容
（请给出正确答案）
参考答案
十点题库官方参考答案
（由十点题库聘请的专业题库老师提供的解答）
