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问题 单项选择题

按照Flynn的分类，奔腾PII的MMX指令采用的是 (12) 模型，而当前的高性能服务器与超级计算机则大多属于 (13) 类。

A．SISD

B．SIMD

C．MISD

D．MIMD

答案

参考答案：A

选择题

读“我国乡镇企业三种发展模式的源地图”，回答题。

小题1:近年来B、C两地企业发展暴露出来的问题分别是(　　)

A．“民工荒”现象严重　水污染严重     

B． 改革开放迟缓　资金严重短缺

C．投资过多，产品积压　缺乏政策支持    

D．经济腹地较小　企业间过度竞争

小题2:A地城市采用“内含式”城市化扩展模式，既保持城区较高的建筑密度，又充分开发利用地下空间，其考虑的主要因素是(　　)

A．城市化水平

B．经济发展水平

C．用地紧张　　

D．人口数量
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单项选择题

Our ape-men forefathers had no obvious natural weapons in the struggle for (1) in the open. They had neither the powerful teeth nor the p claws of the big cats. They could not (2) with the bear, whose strength, speed and claws (3) an impressive " small fire" weaponry. They could not even defend themselves (4) running swiftly like the horses, zebras or small animals. If the ape-men had attempted to compete on those terms in the open, they would have been (5) to failure and extinction. But they were (6) with enormous concealed advantages of a kind not possessed by any of their competitors.

In the search (7) the pickings of the forest, the ape-men had (8) efficient stereoscopic vision and a sense of color that the animals of the grasslands did not (9) . The ability to see clearly at close range permitted the ape-men to study practical problems in a way that lay far (10) the reach of the original inhabitants of the grassland. Good long-distance sight was (11) another matter. Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the (12) the viewpoint, the greater the range of sight-so (13) they had had to do was climb a tree. Out in the open, however, this simple solution was not (14) . Climbing a hill would have helped, but in many places the ground was flat. The ape-men (15) the only possible solution. They reared up as high as possible on their hind limbs and began to walk (16) . This vital change of physical position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became (17) still. (18) , they persevered and their bone structure gradually became (19) to the new, unstable position that (20) them the name Homo erectus, upright man.

11（）

A.rather

B.quite

C.much

D.really
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