在对急性精神分裂症症状的统计中，出现频率最高的症状是（）A、思维鸣响 B、被害妄想

存在于以中心事物为主体的外部周边事物的客体称为环境。在环境科学领域里的中心事物是( )。

A．自然环境

B．人类社会

C．社会环境

D．生态环境

阅读下面这首诗，完成后面的题目。我爱这土地艾青假如我是一只鸟，我也应该用嘶哑的喉咙歌唱：这被暴风雨所打击着的土地，这永远汹涌着我们的悲愤的河流，这无止息地吹刮着的激怒的风，和那来自林间的无比温柔的黎明……——然后我死了，连羽毛也腐烂在土地里面。为什么我的眼里常含泪水？因为我对这土地爱得深沉……一九三八年十一月十七

如果请你来为九年级学生命制试题，请以这首诗为阅读材料，设计两道阅读理解测试题，并注明参考答案及分值

是一种新型长效硝酸酯类药物，生物利用度几乎100％（）

A.硝酸异山梨酯胶囊

B.硝酸甘油

C.硝酸异山梨酯

D.长效硝酸甘油制剂

E.5-单硝酸异山梨酯

The grid computing is a new (66) technology connecting the distributed and (67) 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 (68) 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 (69) 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 (70) the performance of the system.

（70）处填（）。

A．decrease

B．enhance

C．keep

D．balance