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问题 单项选择题 A1/A2型题

CT平扫图像上，与脑实质相比髓母细胞瘤多数表现为（）

A.等密度

B.略高密度

C.低密度

D.混杂密度

E.水样密度

答案

参考答案：B

解析：CT平扫图像上，髓母细胞瘤表现为后颅凹中部均匀一致的类圆形略高密度影，少数为等密度，边缘较清楚。

单项选择题

There is a proposal in Washington to set aside $100 million to support single mothers on welfare who want to get married. This novel idea is a (62) that some of our politicians are coming to understand that the state of our national union (63) greatly on the state of our (64) unions--on the health of the marriage institution in America.
Divorce rates remain very high by (65) standards, and the children of the first generation of easy divorce are well into their own adults lives. (66) all the statistics and anecdotal accounts of this vast subject, what are the key (67) that are leading to health or sickness for the institution of marriage Where are we going wrong And how can we get back on (68)
The central question is whether we have allowed a culture to develop that (69) people for the challenges of marriage. Social (70) on selfishness and self-centeredness, and the achievement-oriented (71) of our business world, all encourage us to put family in (72) place. Marriage often represents the (73) from such a world of selfishness to a world of (74) . Family life is the normal context (75) we can learn that a life filled with (76) about others instead of ourselves is the sure road (77) the most fulfilling joys and satisfactions. But (78) preparing young people to learn this lesson, often we actually seem to be preparing them more for divorce than for marriage. (79) ignorant of the mysteries of giving, too many people enter marriage (80) high expectations of direct personal satisfaction, and then find themselves (81) disappointed and tempted to cut their losses.

A．in spite of

B．instead of

C．along with

D．except for
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单项选择题

设计单位与施工单位是平等的（）关系，他们之间不存在合同关系，都是为工程建设服务的单位，都与建设单位有合同关系。

A.合同

B.无关

C.领导和被领导

D.主体
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