某机场通道两侧需要安装护栏,以保证旅客安全。工程技术人员查阅了有关资料,按照最大百分

题型:单项选择题

问题:

某机场通道两侧需要安装护栏,以保证旅客安全。工程技术人员查阅了有关资料,按照最大百分位数的人体重心高度确定了护栏的高度,从工效学的角度讲,这种设计属于

A.最大值设计

B.最小值设计

C.安全度设计

D.单限值设计

E.中位数设计

考点:公卫执业医师公卫执业医师
题型:单项选择题

阅读理解。

    Most American families are smaller than the families in other countries. Most American families have one

or two parents and one or two children each.   

    Children in the US will leave their parents' home when they grow up. They usually live far from their

parents because they want to find good jobs. They often write to their parents or telephone them. And they

often go to visit their parents on holiday.   

    Parents usually let their children choose their own jobs. Americans think it important for young people to

decide (决定) on their lives by themselves.   

    Children are asked to do some work around their house. And in many families, children are paid for

(被给报酬) doing some housework so that they learn how to make money for their own use.

1. The size of most American families is ______ that of other countries. [ ]

A. larger than   

B. smaller than   

C. as big as  

D. as small as

2. When children grow up, they leave their parents' home to ______. [ ]

A. get married   

B. be free   

C. find good jobs   

D. study

3. They visit their parents ______. [ ]

A. on weekdays   

B. on weekends    

C. at any time   

D. on holiday

4. Which of the following statements is WRONG? [ ]

A. Children have the freedom to choose their own job.  

B. Parents don't ask their children to do the housework.  

C. Parents think it important for children to make their own decision.   

D. When children grow up, they usually live far away from their home.

5. Some parents pay their children for doing housework because ______. [ ]

A. children can learn how to make money for themselves  

B. their children required them to do so  

C. they are rich  

D. it is required by law

题型:单项选择题

肾癌中,最常见的病理类型是()

A.移行细胞癌

B.颗粒细胞癌

C.透明细胞癌

D. * * 状腺癌

E.鳞癌

题型:单项选择题

契约型基金和公司型基金都具有法人资格。(  )

题型:单项选择题

患者,男性,55岁。20年前诊断为慢性乙型肝炎并肝硬化,此后间断出现巩膜黄染、腹胀等,均于对症治疗后好转。2周前患者上述症状再次出现并加重,诊断以"乙肝后肝硬化失代偿期"收住入院。医嘱:0.9%氯化钠注射液200ml+还原型谷胱甘肽2.8g,静滴,2次/日;5%葡萄糖注射液200ml+复方甘草酸苷注射液60ml,静滴,2次/日;多烯磷脂酰胆碱胶囊456mg,口服,3次/日;螺内酯片40mg,口服,2次/日;拉米夫定片0.2g,口服,2次/日。 该患者使用螺内酯的目的是()

A.预防消化道出血

B.治疗肝硬化

C.缓解腹胀

D.抗乙肝病毒

E.保肝、退黄

题型:单项选择题

试验室供分析化验用的水、试剂以及溶液的质量(),分析人员有责任了解、选择和控制()的质量。

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