某市8岁正常男孩体重均有95%的人在18.39~29.45kg,其标准差是() A.

题型:单项选择题 A1型题

问题:

某市8岁正常男孩体重均有95%的人在18.39~29.45kg,其标准差是()

A.2.14kg

B.5.14kg

C.2.82kg

D.0.95kg

E.无法计算

考点:口腔执业助理医师医学统计学方法医学统计学方法题库
题型:单项选择题 A1型题

男,50岁,腹部不适。CT示胰腺略小,胰管轻度扩张,可见较多细小钙化灶,最可能的诊断是()

A.胰腺癌

B.慢性胰腺炎

C.急性胰腺炎

D.胰腺结核

E.动脉硬化钙化

题型:单项选择题 A1型题

For years and years people have been saying that the railways are dead.“We can do without railways” people say,as if motorcars and planes made the railways unnecessary.We all keep hearing that trains are slow,that they lose money,that they’re dying.But this is far from the truth.In these days of expensive oil,the railways have become highly competitive with motorcars and planes.If you want to carry people or goods from place to place,they’re cheaper than planes.And they have much in common with planes.A plane goes in a strange line and so does a railway.What is more,it takes you from the heart of a city into the heart of another.It doesn’t 1eave you as a plane does,miles and miles from the city center.It doesn’t hold you up as a car does,in endless traffic jams.And a single train can carry goods which no plane or motorcar could ever do.Far from being dead,the railways are very much alive.Modern railway lines give you a smooth,untroubled journey.Where else can you eat well,sleep in comfort,feel safe and enjoy the scene while you are traveling at speed at the same time? And we are only at the beginning.For we have just entered the age of super-fast trains, traveling at 1 50 miles an hour and more.Soon we will be wondering why we spent so much on motorways we can't use because we have not enough money to buy the oil and planes we can't fly in for the same reason.

小题1:Some people think the railways are dead for many reasons except that ______  .

A.planes and motorcars will take the place of trains

B.oil is expensive today

C.trains are slow

D.railways lose money小题2:The writer’s idea seems to be that ______  .

A.we can do without railways

B.trains have much in common with motorcars and planes

C.motorcars and planes are not as good as trains

D.trains are as good as motorcars and planes小题3:According to the writer,which of the following is NOT true?

A.It is cheaper to travel by train than by plane.

B.The railway station is usually at the center of a city.

C.When you get off the plane you will find yourself right in the city center.

D.No motorcar or plane can carry as many goods as a train does.小题4:From the underlined sentence at the end of the passage,we can infer that   .

A.1ess and less people will take planes and motorways in the future

B.the people have known that the train is better than planes and motorways

C.trains will be more popular in the future

D.nobody likes spending much money on motorways

题型:单项选择题 A1型题

牛军在《论新中国外交的形成及其主要特征》一文中说,从1952年开始酝酿,到1954年间基本形成了新的被称之为“和平统一战线政策”的对外政策。作为这项政策的两个重要目标——“扩大和平中立趋势”和“推广和平中立地带”,首先落实到中国的周边地区。这一政策

A.超越了社会制度和意识形态分歧

B.率先为印度和越南两国接受

C.意在清除帝国主义在华残余势力

D.改变了中国半殖民地的地位

题型:单项选择题 A1型题

刘某,男,56岁。腹大胀满,青筋显露,面色晦暗,唇紫,心烦口燥,失眠,鼻衄,小便短少,舌质红绛,少津,脉弦细数。治法宜用

A.活血化瘀,行气利水

B.凉血化瘀,滋养肝肾

C.温中健脾,行气利水

D.温补脾肾,化气行水

E.以上都不是

题型:单项选择题 A1型题

从通信网络的传输方面看,数据加密技术可分为链路加密方式、节点到节点加密方式和______加密方式。

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