以下关于无线传感器网络时间同步技术的描述中,错误的是()。 A.无线传感器网络应用中

题型:单项选择题

问题:

以下关于无线传感器网络时间同步技术的描述中,错误的是()。

A.无线传感器网络应用中需要时间同步机制

B.网络时间协议(NTP)是互联网采用的时间同步协议

C.最新的NTPv4精确度已达到毫秒级

D.无线传感器网络使用NTP协议

考点:物联网技术与运用物联网技术与运用题库
题型:单项选择题

某研究者对护理专业学生选择职业时的价值取向进行研究。研究者选择武汉两所大学护理系的护理学生为研究样本。研究问卷选择修订的职业价值观量表,并进行了预试验,得到Cronbachα系数为0.9266。研究者采用现场发放问卷的资料收集方法。

几种抽样方法比较来看,理论上抽样误差最小的方法是()

A.方便抽样

B.分层抽样

C.目的抽样

D.整群抽样

E.系统抽样

题型:单项选择题

汉灵帝建宁元年(168),名士( )为太傅,与大 * * 窦武(窦太后之父)共同执政。他们起用李膺和被禁锢的其它名士,并密谋诛杀宦官。

A.李膺

B.王畅

C.皇甫规

D.朱穆

题型:单项选择题
Mr Clarke works in a middle school. He likes reading and often  1 some books from the library. He keeps  2 to the radio every morning and reading  3 after supper. So he knows much and teaches well. His  4 worship(崇拜)him very much. Mike, Mr Clarke’s little son,is only nine. He  5 likes reading books. And he often asks his father some questions. Mr Clarke always thinks he’s too  6 to understand him and chooses_ones to answer. Of course the boy is not satisfied with(对…满意)it.
One day Mike read  8 about the electric lights(电灯)and was  9   it.When his father told him to do some housework,he went on thinking of it.He asked him  10 questions,and his father answered all.Then his father said proudly,“Fathers always know  11 than sons!”The boy thought for a while and said,“  12 !”
  “Oh? Why?”
  Mike didn’t answer and asked,  13 ,“Who invented the electric lights?”
  “  14 .”answered Mr Clarke.
  “Why didn’t his father invent them,then?”
Looking at his son,Mr Clarke didn’t know  15  to answer !
小题1:
A.findsB.sellsC.buys D.borrows
小题2:
A.watchingB.listeningC.goingD.touching
小题3:
A.newspapersB.lettersC.storiesD.messages
小题4:
A.teachersB.parents C.students D.classmates
小题5:
A.alsoB.neverC.even D.only
小题6:
A.old B.youngC.cleverD.able
小题7:
A.more ifficult B.the most difficultC.easyD.the easiest
小题8:
A.everythingB.nothingC.somethingD.anything
小题9:
A.worried aboutB.interested inC.afraid ofD.angry with
小题10:
A.fewB.little C.a fewD.a little
小题11:
A.moreB.mostC.less D.least
小题12:
A.So do IB.Neither am IC.I agree D.I don’t think so
小题13:
A.insteadB.carefully C.quicklyD.brightly
小题14:
A.Thomas BrownB.Allan SmithC.Thomas EdisonD.Ron Jenkins
小题15:
A.whenB.whatC.whereD.which
题型:单项选择题

用诗文原句填空。(10分)

小题1:过尽千帆皆不是,                 。                     (温庭筠《望江南》)

小题2:江山如此多娇,                  。               (毛 * * 《沁园春·雪》)

小题3:                ,五十弦翻塞外声。                    (辛弃疾《破阵子》)

小题4:物是人非事事休,                。                     (李清照《武陵春》)

小题5:                ,西北望,射天狼。                     ( 苏轼《江城子》)

小题6:                  ,燕然未勒归无计。                    (范仲淹《渔家傲》)

小题7:鸡声茅店月,                      。                  (温庭筠《商山早行》)

小题8:独在异乡为异客,                  。          (王维《九月九日忆山东兄弟》)

小题9:遵义会议是指1935年1月中 * * 政治局在贵州遵义召开的一次极其重要的扩大会议,是在红军第五次反“围剿”失败和中国革命严重危难的情况下召开的。这次会议确定了毛 * * 的领导地位,其开始领导我党我军的情形正如诸葛亮在《出师表》中所说的那样:“                            

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