请根据以下资料。回答下列问题。 某项目施工现场设有混凝土搅拌站,为了赶工期,施工单位实行“三班倒”连续进行混凝土搅拌生产。附近居民意见极大,纷纷到有关管理单位反映此事,有关部门也作出了罚款等相应的处理决定。 编制环境管理体系文件的重要意义有______。
A. 可以把环境管理体系的所有工作程序和规定在文件中固定下来
B. 有助于组织活动的长期一致性和连贯性
C. 有助于员工对全部体系的了解并明确自己的职责和责任
D. 可以展示本组织环境管理体系的全貌
E. 一份完整的管理文件可以作为体系评审和认证的基本证据
As we enter the 21st century, a new global economy draws nations ever closer. But our growing interdependence (1) on much more than technology and trade. For we are linked intrinsically (本质地) by the physical and biological webs that (2) life on our planet—and, increasingly, by the threat of their unraveling (散开). Indeed, (3) we reach across borders and face this threat together, the next century may (4) an Earth in ecological crisis, with half of all (5) gone, and our grandchildren enduring deadly floods, drought and disease (6) by global warming.When millions across America (7) the first Earth Day 30 years ago, our focus understandably was our own backyard. Our rivers were (8) on fire, and our skylines were disappearing behind a (9) of smog. America’s remarkable environmental progress in the years (10) is powerful testament (证明) to our national will, our technological prowess (超凡技术) and our (11) in a better future. Protecting the environment is today a bedrock (基本的) American value, (12) important to us as safe neighborhoods and good schools. What’s more, three decades of experience have (13) the naysayers (反对的人) wrong. Tending to the environment has not (14) our economy. (15) , our air and water are the cleanest they have been in a generation, even as we enjoy the longest economic (16) in our nations’ history.America’s responsibility now, as we mark the first Earth Day of a new millennium (一千年), is to bring these lessons to bear against new, more (17) environmental challenges. We must look well (18) our own cities and countryside, make environment a core foreign policy (19) and provide the leadership needed to put all nations on a cleaner, more sustainable path to (20) . Reed the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D.20()
A. prosperity
B. priority
C. liability
D. welfare
由于内存大小有限,为使得一个或多个作业能在系统中运行,常需要外存来换取内存。其中以作业为单位对内外存进行交换的技术称为 (44) 技术,在作业内部对内外存进行交换的技术称为 (45) 技术。用外存换内存是以牺牲程序运行时间为代价的。为提高CPU有效利用率,避免内外存的频繁交换, (45) 技术常用某种 (46) 来选择换出内存的页面,它的基础是程序的 (47) 。据此,操作系统可根据 (48) 来改善系统的性能, (48) 是一个进程在定长的执行时间区间内涉及的页面的集合。 (48)处填()。
A. 工作集
B. 页面集
C. 段号集
D. 元素集
存储器是计算机系统的记忆设备,它主要用于存放 (1) ,而存储单元是指一 (2) 。存储器系统由分布在计算机各个不同部件的多种存储设备组成:位于CPU内部的寄存器,以及用于CPU的控制存储器。内部存储器是可以被处理器直接存取的存储器,又称为主存储器。它主要由 (3) 半导体存储器构成。存储器系统的性能主要由存取时间、存储器带宽、存储器周期和数据传输率等来衡量,其中存储周期指的是 (4) 。若一存储器的存储器周期是500ns,而每个周期可访问4字节。则该存储器的带宽是 (5) 。 (5)处填()。
A. 32Mbit/s
B. 64Mbit/s
C. 128Mbit/s
D. 256Mbit/s