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问题 选择题
国庆节，小明的妈妈带他去旅游，妈妈给他带了红、蓝2件毛衣和黑、白、灰3条裤子，现在他要任意拿出1件毛衣和1条裤子配成一套，正好是蓝毛衣和白裤子的可能性是（　　）
A．
1
2
B．
1
3
C．
1
6
答案

方法有：红毛衣和黑裤子、红毛衣和白裤子、红毛衣和灰裤子、蓝毛衣和黑裤子、蓝毛衣和白裤子、蓝毛衣和灰裤子，共有3×2=6（种）；

则蓝毛衣和白裤子只有1种，则可能性是：1÷6=

1
6
．

答：正好是蓝毛衣和白裤子的可能性是

1
6
．

故选：C．

填空题

在SQL语言中，关系模式称为______，存储模式称为______，子模式称为______。
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单项选择题

Attempts to understand the relationship between social behavior and health have their origin in history. Dubos (1969) suggested that primitive humans were closer to the animals (1) they, too, relied’upon their instincts to stay healthy. Yet some primitive humans (2) a cause and effect relationship between doing certain things and alleviating (3) of a disease or (4) the condition of a wound. (5) there was so much that primitive humans did not (6) the functioning of the body, magic became an integral component ofthe beliefs about the causes and cures of heath (7) Therefore it is not (8) that early humans thought that illness was caused (9) evil spirit. Primitive medicines made from vegetables or animals were invariably used in combination with some form of ritual to (10) harmful spirit from a diseased body.

One of the. earliest (11) in the Western world to formulate principles of health care based upon rational thought and (12) of supernatural phenomena is found in the work of the Greek physician Hippocrates. The writing (13) to him has provided a number of principles underiying modern medical practice. One of his most famous (14) , the Hippocratic Oath, is the foundation of contemporary medical ethics.

Hippocrates also argued that medical knowledge should be derived from a (15) of the natural science and the logic of cause and effect relationships. In this (16) thesis, On Air, Water, and Places, Hippocrates pointed out that human well-being is (17) by the totality of environmental (18) : living habits or lifestyle, climate, geography of the land, and the quality of air, and food. (19) enough, concerns about our health and the quality of air, water, and places are (20) very much written in twentieth century.

13（）

A.attributed

B.committed

C.acknowledged

D.confined
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