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问题 单项选择题

已知IP=1000H，(SP)=2000H，(BX)=283FH，CALL WORD PTR [BX]指令的机器代码是 FF17H，试问执行该指令后，(IFFEH)＝ ( )

A．28H

B．3FH

C．00

D．02H

答案

参考答案：D

解析： 下一IP＝1000H+2＝ 1002H，CALL WORD PTR[BX]是段内调用。只要压入IP的值就可以了。堆栈的内容为 1002H(即下一IP的值。)压入IP后，SP-2＝ 1FFEH。(1FFEH)应该＝02H(即栈顶的值)。

单项选择题

在健康保险中，一般均对一些金额较低的医疗费用采用免赔额的规定，即（）。

A.保险人只负责低于免赔额的部分

B.保险人只负责超过免赔额的部分

C.保险人只负责等于免赔额的部分

D.保险人只负责免赔额的不足部分
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填空题

Today’s lecture is about the mass (1) of the world’s population. There are two major (2) why people are moving to cities. The first reason is (3) . People are moving to the cities because that’s where they can find (4) and earn money. The second reason for the move to cities has to do with (5) of life issues: comfort and (6) . Cities often offer better (7) . And then for many, city life is just more (8) . An interesting consequence of urbanization is that the average (9) of people in the countryside is increasing, while that of the cities is (10) .
Three key (11) can be identified in our cities. First of all, they’re getting bigger. Most cities are bigger now than ever before. Cities are also changing shape. They’re getting (12) , because land is getting more and more expensive. (13) have become a symbol of modern cities.
Cities are also changing shape in other ways. The (14) Model and the (15) Nuclei Model are probably more typical of the cities we know today. They show the urban (16) that’s occurring in contemporary cities.
The third change is that our cities are breaking up into (17) communities, often by (18) group or (19) level. This often means that people stay within their community and do not come into contact with others from different (20) .
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