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问题 单项选择题 A1/A2型题

关于抗原抗体反应的特点表述，正确的是（）。

A.抗原抗体反应有交叉反应，故抗原抗体反应特异性不强

B.抗原抗体反应必须在抗体量略大于抗原量时，形成的复合物最大

C.抗原抗体反应形成的复合物又可解离为游离的抗原与抗体

D.抗体与抗原结合牢固，不易被解离

E.抗原抗体反应分为两个阶段，两个阶段之间有明显的界限

答案

参考答案：C

解析：抗原抗体的结合是可逆的。

单项选择题

The grid computing is a new (81) technology connecting the distributed and (82) resources to the high-speed network and integrating a super-computer of processing capacity. The significance and architecture of the grid computing is explained. Several kernel technology such as OGSI, resource management, task management, task scheduling, high rate communication and security are described. Aiming at the particularity of the grid computing environment a mechanism similar to the technology of the search engine is designed to registry, discovery and (83) the resources in the grid. The whole model of the resource management is built by connecting task manager in the local resource management system to others with P2P model. The task may migrate among the task managers in order to (84) the load. The task users summit may be executed in relatively tight resource set, which will not only decrease the total communication overheads of the whole task but also (85) the performance of the system.

A. decrease B. enhance C. keep D. balance
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单项选择题

《电力工业技术管理》法规定：汽轮机调速系统的速度变动率应为（）。

A.3～6%

B.4～7%

C.6～8%

D.7～10%
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