在梁的正应力公式σ=My／Ix中，Ix为梁截面对何轴的惯性矩？（）
| Whenever I hear a weather report
declaring it’s the hottest June l0 on record or whatever, I can’t take it too
seriously, because "ever" really means "as long as the records go back", which
is only as far as the late 1800s. Scientists have other ways of measuring
temperatures before that, though--not for individual dates, but they can ten the
average temperature of a given year by such proxy measurements as growth marks
in corals, deposits in ocean and lake sediments, and cores drilled into glacial
ice. They can even use drawings of glaciers as there were hundreds of years ago
compared with today. And in the most comprehensive compilation of such data to date, says a new report from the National Research Council, it looks pretty certain that the last few decades have been hotter than any comparable period in the last 400 years. That’s a blow to those who A. The new report from NRC is motivated by the controversy over Michael Mann’s claim. B. Those who doubt global warming consider that warming is a natural phenomenon. C. Those suspicious of global warming take an inconsistent stance on the issue. D. The argument ends in the defeat of global-warming-doubters. [单选题]棱镜分离法测量远近眼位的预期值描述正确的是
A.原因是调节的下降导致了调节性集合的不足，老视人群外斜偏大内斜偏小 B.原因是调节的下降导致了自主性集合的不足，老视人群外斜偏大内斜偏小 C.原因是调节的下降导致了融像性集合的不足，老视人群外斜偏大内斜偏小 D.原因是调节的下降导致了近感性性集合的不足，老视人群外斜偏大内斜偏小 [单项选择]The ipad
1 The iPad is a tablet computer designed, developed and marketed by Apple primarily as a platform for audio-visual media including books, periodicals, movies, music, games, and web content. At about 1.5 pounds (680 grams), its size and weight fall between those of contemporary smartphones and laptop computers. Apple released the iPad in April 2010, and sold 3 million of the devices in 80 days.
2 The iPad runs the same operating system as the iPod Touch and iPhone─and can run its own applications as well as iPhone applications. Without modification, and with the exception of web applications, it will only run programs approved by Apple and distributed via its online store.
3 Like iPhone and iPod Touch, the iPad is controlled by a multitouch display─a departure from most previous tablet computers, which used a pressure-triggered stylus─as well as a virtual onscreen keyboard in lieu of a physical keyboard. The iPad uses a Wi-Fi data connection to browse the Internet, load an
[不定项选择题]共用题干
第二篇
Call American Their Names A great difference between American social customs and those of other countries is the way in which names are used.Americans have little concern for"rank",especially socially. Most Americans do not want to be treated in any especially respectful way because of their age or social rank;it makes them feel uncomfortable.Many Americans even find the terms"Mr.","Mrs."or"Miss" too formal.People of all ages may prefer to be called by their first names."Don't call me Mrs. Smith.Just call me Sally."Using only first names usually indicates friendliness and acceptance. However,if you do not feel comfortable using only first names,it is quite acceptable to be more formal.Just smile and say that after a while you will use first names but you are accustomed to being more when you first meet someone. Very often,introductions are made using both first and last names:"Mary Smith,this is John Jones."In this situation you are free to decide whether to call the lady"Mary"or"Miss Smith". Sometimes both of you will begin a conversation using last names,and after a while one or both of you may begin using first names instead.You have a choice:if you don't want to use first names so quickly, no one will think it impolite if you continue according to your own custom. Which of the following statements is NOT true? A.The way names are used in America is different from those of other countries. B.Many Americans are used to being called by their first names. C.It shows friendliness and kindness to use only first names. D.When you talk to people in the United States,you have to use their first names. [多选题]郎酒的干部标准要经过三种严格的考验( )。
A. 正直 B. 智慧 C. 成熟 D. 积极 [判断题]《铁路工务安全规则》规定：车站内其他线路作业，躲避本线列车时，下道距离不小于500m。
[单选题]在称量吸湿性很强的固体试样时，常釆用（）进行称量。
A.A.指定质量法 B.B,直接称量法 C.C.减量法 D.D.以上三种均可以 [单选题]2.769.第769题
农村电网的自然功率因数较低，负荷又分散，无功补偿应采用分散补偿为主。 A.正确 B.错误 [单选题]下列关于火场警戒要求的表述中，错误的是( )。
A.火场警戒都由消防部门来负责实施。 B.设置警戒区时，要根据火灾或灾害事故的不同种类、性质，设置相应的警戒标识。 C.在实施警戒的过程中，要防止无关人员或围观群众随意进出火场。 D.警戒人员要做好个人防护，防止中毒、灼伤等事故的发生。 [单项选择]由苍术、厚朴、陈皮、甘草、生姜和大枣组成的方剂是（）
A. 二陈汤 B. 平胃散 C. 厚朴温中汤 D. 半夏厚朴汤 E. 以上都不是 [多选题]重大活动电力安全保障应当遵循( )的工作原则。
A.超前部署 B.规范管理 C.各负其责 D.相互协作 [单选题]C-C-A-002 425
导致钢浮顶油罐K•盘原因是()。 A. 油品太轻 B. 油罐的椭圆度不够或者是钢浮盘本身结构和材料造成 C. 油品进確的流速太快 D. 油縦液位太高 [判断题]固定作业是指与行车量增减有关的作业
A.正确 B.错误 [多项选择]项目建设准备阶段的咨询包括( )。
A. 项目评估 B. 项目建议书 C. 工程勘察设计 D. 融资咨询 E. 工程和设备的招标评标 [单选题]在学校的师生关系中，最基本的关系是()
A.以年轻一代成长为目标的社会关系 B.以直接促进学生发展为目标的教育关系 C.以维持和发展教育关系为目标的教育关系 D.以传承文化为目标的授受关系 [单选题]767.下列有关胃肠激素的叙述，错误的是
A.A.所有胃肠激素都是肽类物质 B.B.在化学结构上促胃液素和CCK属于同一家族 C.C.食物的消化产物可刺激它们的释放 D.D.所有胃肠激素也存在于中枢神经系统 E.E.主要生理作用是调节消化腺分泌和消化道运动 [单选题]下面哪一项不是门脉高压的常见表现肝肿大
A.脾肿大 B.肝肿大 C.食管静脉曲张破裂出血 D.腹水 E.痔核形成 我来回答: 提交
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