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问题 单项选择题

安乐死的定义是（）

A.自然死亡

B.他人干预死亡

C.无痛苦死亡

D.脑死亡

E.自己结束生命

答案

参考答案：C

解析："安乐死"来源于希腊文，意思是无痛苦的、幸福的死亡。它包括两层含义，一是无痛苦的死亡，安然的去世；二是无痛致死术，为结束患者的痛苦而采取致死的措施。安乐死的对象，主要是那些患了绝症，目前无法救治，只是在人为条件下维持心跳、呼吸或意识已处于昏迷或完全丧失状态，虽生犹死的患者。故选C。

单项选择题 A1/A2型题

关于食管癌的淋巴转移特点，下列错误的是（）

A.仅次于血行转移的转移途径

B.上段食管癌常转移至锁骨上及颈淋巴结

C.中下段多转移至气管旁、贲门及胃左动脉旁淋巴结

D.各段均可向上或向下方的淋巴结转移

E.约1／4病例的淋巴结转移是跳跃式
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单项选择题

Humans are social animals. They live in groups all over the world. As these groups of people live apart from other groups, over the years and centuries they develop their own habits and ideas, which form different cultures. One important particular side of every culture is how its people deal with time.
Time is not very important in non-industrial societies. The Nuer people of East Africa, for example, do not even have a word TIME that is in agreement with the abstract thing we call time. The daily lives of the people of such non-industrial societies are likely to be patterned around their physical needs and natural events rather than around a time schedule based on the clock. They cook and eat when they are hungry and sleep when the sun goes down. They plant crops during the growing seasons and harvest them when the crops are ripe. They measure time not by a clock or calendar, but by saying that an event takes place before or after some other events. Frequently such a society measures days in terms of "sleeps" or longer periods in terms of "moons". Some cultures, such as the Eskimos of Greenland measure seasons according to the migration of certain animals.
Some cultures which do not have a written language or keep written records have developed interesting ways of "telling time". For example, when several Australian aborigines want to plan an event for a future time, one of them places a stone on a cliff or in a tree. Each day the angle of the sun changes slightly. In a few days, the rays of the sun strike the stone in a certain way. When this happens, the people see that the agreed-upon time has arrived and the event can take place.
In contrast, exactly correct measurement of time is very important in modern, industrialized societies. This is because industrialized societies require the helpful efforts of many people in order to work. For a factory to work efficiently (well, quickly and without waste), for example, all of the workers must work at the same time. Therefore, they must know what time to start work in the morning and what time they may go home in the afternoon. Passengers must know the exact time that an

The Australian aborigines’ way of "telling time" is based on ______.

A. the change of the sun rays
B. the movement of the earth in relation to the sun
C. the position of the stone
D. the position of the tree or the cliff
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