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问题 单项选择题

政治参与者有分歧，但存在共同利益，为此他们采用的典型策略是讨价还价，结果是赢家多于输家或者每一方都是赢家。这样一种政治情形属于（）。

A.非零和博弈

B.积极的非零和博弈

C.消极的非零和博弈

D.零和博弈

答案

参考答案：B

单项选择题

在乳腺癌半野切线等中心定位时，下列描述中哪项是错误的（）

A.将X1，X2对称放大分别放于内外切线的两根铅丝上，初步中心基本确定，但治疗床可左右移动

B.在透视下边转动大机架边升床，使内外切的两根铅丝和射野的中心重叠

C.在透视下看射野是否切肺1.5～2cm，不理想时可调两根铅丝间的距离

D.进机房看上下界是否理想，调节X轴使射野外界开放于皮肤外1cm

E.治疗床不动，转动大机架180°到相应外切野
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单项选择题

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

In recent years, there has been a dramatic increase in the range of media used to (71) information. Initially, communication was limited to simple forms of (72) such as voice and paper. This century, however, has witnessed the introduction of a greater variety of media types such as the telephone and visual forms of media. In the latter part of the century, this trend has accelerated and there is now a wide range of media types available to convey information. These advances provide a great opportunity for new developments in a range of areas such as education and commerce. However, there are also a number of problems associated with the growth of (73) in society. In particular, there is a great danger of creating information (74) . This problem can be seen, for example, in business where executives are required to make decisions based on an ever increasing variety and volume of information. (75) problems are also occurring in areas such as government, health care and education.

（73）是（）

A.knowledge

B.computers

C.information

D.technology
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