问题 单项选择题 案例分析题

将200例某恶性肿瘤患者随机分为两组,分别给予甲、乙两种治疗,并对患者的生存情况进行每年1次,连续6年随访,其中10例患者失访,采用寿命表法计算得到1年、3年、5年甲法治疗患者生存率分别为95%、79%、65%,乙法治疗患者生存率分别为82%、68%、55%

下列说法正确的是()

A.可估计两种疗法患者的半年生存率

B.无法估计两种疗法患者的2年生存率

C.甲法患者1年生存率等于其1年生存概率

D.甲法患者6年生存率一定大于乙法

E.甲法患者2年生存率可能小于3年生存率

答案

参考答案:C

解析:

1.由于随访1年1次,因此可计算两种疗法患者2年生存率,但无法估计其半年生存率,故选项A、B错误。甲、乙两种疗法患者的1年生存率即为第一年这个时间段的生存概率,故选项C正确。

2.t检验、方差分析适用于定量资料样本均数间的比较,Z检验可用于定量资料两大样本的均数或率的比较,秩和检验既可用于定量资料又可用于等级资料的分析,对于不包含截尾数据的生存资料,也可用秩和检验进行比较,本例存在失访的病例,故采用对数秩检验进行生存曲线的比较,故选项E正确。

阅读理解

阅读理解。

     It took me more than 10 years to realize that the world has no shortage of fashion (时尚) designers

who have the ability to make trendy and elegant garments, but that it is badly in need of, simply, clothes

designers. My own definitions would set fashion and clothing greatly apart. It is a fact that, in the shopping malls, there are plenty of beautiful garments whose unpredictability makes our life colorful and interesting. You are almost convinced: You can buy whatever you dare to think.

      There is no doubt that fashion designers are usually with high qualifications. They study fashion trends, select colors, and make sure the final production of their designs is done properly. However, as

experience grew with age, my attraction to arts became ever stronger. I have a strong desire for clothing

to stand as does paint to the painter, as does stone to the sculptor, as a simple and particular language of

an individual creation, which draws the audience from an appreciation of the surface to deeper thoughts

with the world of the soul. I believe that the most meaningful creative motives should arise through caring

for other people, the great care of humanity-a concern for human feeling and spirituality. This includes

love, but it is bigger than love, and it is unconditional. I believe the greatest works of art can touch the

deepest and strongest parts of human feelings and the world of the spirit, and only these works can be

the memories of history, preserving the most valuable feelings that have ever existed, and inspiring a

greater awareness of ourselves.

     I am not satisfied if people only appreciate clothing if it merely satisfies their desire. I believe clothing

could be a specific creative language for communicating ideas and thoughts, for inspiring you and shaping

your behavior. Those clothes fashioned out of necessity possess a power that can continue to exist across

the ages. This is what I have tried to achieve, the clothing to return to its original simplicity, the clothing to

help people regain the natural sense. The true fashion today should not follow the trends. It should instead uncover the extraordinary in the ordinary, for I believe the pleasure you get from the clothing is not its

price, but its spirit.

1. According to the writer, most fashion designers are ______.  

A. lack of imagination    

B. deep in thought

C. unproductive      

D. trendy

2. By saying "This includes love" in Paragraph 2, the writer regards "love" as ______. 

A. a very important part of the spiritual world

B. what can be achieved through the works of hand

C. one of the most meaningful creative motivations

D. a form of concern for human feeling and spirituality

3. The writer indicates that the primitive clothes are made as a result of ______. 

A. respect for nature      

B. spiritual value

C. necessity        

D. simplicity

4. What is the main idea of the passage? 

A. Humanity is fundamental in fashion design.

B. The growing fashion trends present human interest.

C. Designers must concern for the desire of consumers.

D. Fashion clothes have close relations with earth predictions.

单项选择题