拟了解居民经常吃排骨汤与血压间的关系,故对某城市社区35岁以上的居民按是否经常进食排

题型:单项选择题 A3/A4型题

问题:

拟了解居民经常吃排骨汤与血压间的关系,故对某城市社区35岁以上的居民按是否经常进食排骨汤分组,连续观察了10年,随访两组高血压的发病率。

这项研究设计中不可能存在的偏倚是()

A.信息偏倚

B.混杂偏倚

C.失访偏倚

D.选择偏倚

E.解释偏倚

考点:口腔执业助理医师流行病学原理和方法流行病学原理和方法题库
题型:单项选择题 A3/A4型题

每千瓦时电费0.52元,每立方米水费2元.小明家本月用了a千瓦时电和b立方米水,一共要付水电费______元.

题型:单项选择题 A3/A4型题

如何理解中国古代的定都原则

题型:单项选择题 A3/A4型题

阅读理解。

                                                           Foods from Around the World

      Foods that are well known to you may not be familiar to people from other countries. Here are four

people's experiences with foreign food.

      Shao Wong is a student in France. He comes from China. "I'd never tasted cheese or even milk before

I came here. Cattle are rare in my part of China, so there are no dairy products. I tried milk when I first

arrived in France. I hated it! I sampled cheese too, but couldn't manage more than one bite. I love ice cream,

though, and that's made from milk."

      Birgit is from Sweden. She traveled to Australia on vacation. "I was in a restaurant that specialized in fish,

and I heard some other customers order flake. So I ordered some too and it was delicious. Later, I found out

that flake is an Australian term for shark. After that pleasant experience, whenever I see a new food I try it

out on purpose. You know why? I remember how much I enjoyed flake."

      Chandra is a dentist in Texas. She originates from India. "I'm frightened of eating new foods because they

might be made from beef. I'm a Hindu, and my religion forbids me to eat meat from the cow. It's a sacred

animal to Hindus, so that's the reason I can't eat hamburgers or spaghetti with meatballs." 

       Nathan is American. He taught for a year in China. "My friends gave me some 100-year-old eggs to eat.

I didn't like the look of them at all. The insides were green, but my friends said the color was normal. The

Chinese put chemicals on fresh eggs. Then they bury them in the earth for three months. So the eggs weren't

really very old. Even so, I absolutely refused to touch them."

       Life in a new country can be scary, but it also can be fun. Would you sample a 100-year-old egg? Would

you order shark in a restaurant?

1. Which of the following sentences is true about Shao Wong? [ ]

A. He is a French-Chinese.

B. Cattle are seldom raised in his hometown.

C. He doesn't like any diary products.

D. He didn't taste cheese because he hated it.

2. What kind of girl is Birgit?[ ]

A. Religious.

B. Brave.

C. Confident.

D. Open- minded.

3. Chandra is frightened of eating food made from beef, because _____. [ ]

A. It's against Hindus' religion.

B. She is a doctor and she thinks beef is not easy to chew and digest.

C. She is an Indian.

D. Hindus think beef is not tasty.

4. The underlined word "Sacred" in paragraph 4 means _____. [ ]

A. frightening

B. large

C. man-eating

D. greatly respected

5. What can you infer from this passage? [ ]

A. Foods that are well known to you may not be familiar to people from other countries.

B. Despite (虽然) cultural differences in food, have a try and maybe you'll get used to it.

C. A vacation is a good way to learn about new foods. Be sure to go on vacation more often.

D. People dislike eating new foods only because their religion forbids it.

题型:单项选择题 A3/A4型题

工作长度为3m的竹质挂钩梯,其型号为()。

A.TDL3

B.TEZ6

C.TGZ3

D.TSZ9

题型:单项选择题 A3/A4型题

旅客站台分为低站台、高站台,低站台高度为300mm、500mm,高站台高度为()。

A.600mm

B.800mm

C.1100mm

D.1250mm

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