搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某医师要对甲、乙两疗法的疗效作比较，把患者随机分为两组，以两种方法治疗，得如下结果：

此资料的类型是（）。

A．多项无序分类资料

B．二项无序分类资料

C．定量资料

D．单向有序分类资料

E．双向有序分类资料

答案

参考答案：D

单项选择题

(一)
世界博览会，是一个富有特色的讲坛，它鼓励人类发挥创造性和主动参与性。把科学性和情感结合起来，将有助于人类发展的新概念、新观念、新技术展现在世人面前。其特点是举办时间长、展出规模大、参展国家多、影响深远。因此，世博会被誉为世界经济、科技、文化的“奥林匹克”盛会。
中国2010年上海世界博览会，于2010年5月1日至10月31日在中国上海市举行。此次世博会也是由中国举办的首届世界博览会。上海世博会以“城市，让生活更美好”(Better City，Better Life)为主题，总投资达450亿人民币，创造了世界博览会史上最大规模纪录。

2010年上海世博会是第( )届世界博览会。

A．45

B．41

C．40

D．42
查看答案
阅读理解
阅读理解。
Monday, April 17
Dear Gramps,
     I was so upset last week when somebody stole my Super Racer from the park by your house. I
called up the toy company but they said they have only red, blue and green racers. Dad called Cobb's
Toy Store today and found out they might have purple ones. Can we go there when I come to visit
you next week?
     You and I were only gone for a few minutes to the shop down the street to get ice-cream and
cookies. Maybe the thief was watching us. Mum was surprised when I told her the racer was stolen.
She said she used to leave things at the park all the time when she was young. Once she even left her
bicycle for two days near the swimming pool.
     Tell Grandma that I like the food she made last time. Ask Grandma if we can have pancakes with
sugar for breakfast when I come this time. I have packed in my towel, comb and soap. Tell her this
time I won't forget to pack in my toothbrush.
Love
Toby
1. The writer wants to have a _____ racer.
A. red
B. blue
C. green
D. purple
2. How long did the writer leave his Super Racer at the park?
A. Two days.
B. A few minutes.
C. Over a week.
D. All the time.
3. Which of the following is true?
A. Cobb's Toy Store is far from Gramps' house.
B. There were lots of thieves when Toby's mum was young.
C. The writer visited Gramps pretty often.
D. The writer took his toothbrush with him on his last visit.
查看答案