某饭店老板请来许多一流的建筑师和工程师,探讨如何扩建狭小老旧的电梯。他们一致认为

题型:选择题

问题:

某饭店老板请来许多一流的建筑师和工程师,探讨如何扩建狭小老旧的电梯。他们一致认为:饭店必须停业半年才能扩建好电梯。饭店一位清洁工说:“要是我,就会直接在屋外装上电梯。”根据清洁工的建议,新电梯很快就安装好了。这是建筑史上第一次把电梯安装在室外。这一案例表明(  )

①丰富的专业知识是创新思维的源泉 

②丰富的实践经验必然促进思维创新 

③正确发现和提出问题是创新的首要环节 

④创新是对既有理论和实践的突破

A.①②

B.②③

C.①④

D.③④

考点:创新的社会作用辩证否定观和辩证法的革命批判精神要求创新
题型:选择题

防腐剂()

A.按给药途径分类 

B.按分散系统分类 

C.按制法分类 

D.按形态分类 

E.按药物种类分类

题型:选择题

危重抢救记录以下哪一项是错误的()

A.应及时完成记录

B.至少在抢救结束后6小时内据实补记

C.在抢救结束后24小时可补记

D.补记要注明抢救完成时间,具体到分钟

E.要详细记录病情变化情况、抢救时间及措施、参加抢救的医务人员姓名及专业技术职称

题型:选择题

一组数据8,12,x,11,9 的平均数是10,则这组数据的方差是:______.

题型:选择题
.
x
是x1,x2…,x100的平均数,a是x1,x2…,x40的平均数,b是x41,x42…,x100的平均数,则
.
x
,a,b之间的关系为______.
题型:选择题

Ann will either take a leave of absence from Technocomp and return in a year or else she will quit her job there, but she would not do either one unless she were offered a one-year teaching fellowship at a prestigious university. Technocomp will allow her to take a leave of absence if it does not find out that she has been offered the fellowship, but not otherwise. Therefore, Ann will quit her job at Technocomp only if Technocomp finds out she has been offered the fellowship.
Which one of the following, if assumed, allows the conclusion above to be properly drawn

A.Technocomp will find out about Ann being offered the fellowship only if someone informs on her.

B.The reason Ann wants the fellowship is so she can quit her job a Technocomp.

C.Technocomp does not allow any of its employees to take a leave of absence in order to work for one of its competitors.

D.Ann will take a leave of absence if Technocome allows her to take a leave of absence.

E.(E) Ann would be offered the fellowship only if she quit her job at Technocomp.

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