问题 单项选择题

为比较某新药与常规药治疗贫血的疗效是否有差别,将80名中度贫血的10岁男童按身高、体重相近配成40对。将对子中的两名患者随机分为两组,一组给予新药,另一组给予常规药物。经过一个疗程的治疗后,测量其血红蛋白增加量(g/L)。假设新药组和常规药物组的血红蛋白增加量服从正态分布,应采用的假设检验方法为()。

A.χ2检验

B.配对t检验

C.成组t检验

D.配对设计差值的符号秩和检验

E.成组设计两样本比较的秩和检验

答案

参考答案:B

解析:本题资料为配对设计定量资料,且已知新药组和常规药物组的血红蛋白增加量服从正态分布,应采用配对t检验,故选项B正确。

填空题
阅读理解

The first English week at our school started on May 4th, 2009. The whole school was filled with an English learning atmosphere. A series of activities was held. There were handwriting activities, story writing, English songs, role playing in English, and so on, all the teachers and students were very happy. They spoke English, sang English songs and enjoyed all the activities.

Handwriting was for the students in lower grades. Although most of them couldn’t write so well, they were all very careful about it. In the show window, there were a lot of colorful handwritten papers. They copied some articles from books or newspapers. And then they decorated them with pictures in different colors, and some even put their own photos on them. How cute and lovely they looked!

Story writing was for students in Grade 7 and Grade 8. These students are always fond of cartoons, so they got interested in this activity. Reading the stories they made up, all the visitors couldn’t help speaking highly of them.

The most important event was the English show on the last day. The students and teachers presented(上演) a lot of English songs and English operas. Each program won storms of applause.

One week is not very long, but all the students and teachers learned a lot. Just as the headmaster said, “It is a helpful week. It will certainly lead us to enjoy and learn more from our English studies.”

小题1:In this passage, the English week is described as__________.

A.surprising

B.boring

C.enjoyable

D.serious小题2:Which of the following is Not true?

A.All the students took part in the handwriting contest.

B.The story writing contest was for students in Grade 7 and Grade 8.

C.The English show was the most important event.

D.Teachers also took part in the English week.小题3: What does the underlined word “applause” probably mean?

A.Noise

B.Cheer

C.Sound

D.Music小题4:What does the writer probably want to tell us at the end of the passage?

A.The activities are a good way to learn English.

B.Students usually don’t like English.

C.The activities last longer.

D.Learning English in the classroom is invaluable.