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电分相设置形式的发展历史是从锚段关节式到()器件式再到。
A、锚段关节式
B、三跨
C、二跨
D、一跨
上堤道路道口与堤顶交会处不能占压(),不能降低堤顶高程。
A、堤顶宽度
B、堤顶高度
C、堤坡
D、堤脚
对变形缝检查时,应重点查看变形缝两侧有无()、缝口有无损坏等。
A、明显错动
B、垃圾
C、杂物
D、杂草
Your computer has the following hardware configuration: 512 MB of RAM 1 0-GB hard disk 933-MHz processor 64-MB video adapter. You want to install Microsoft Windows Vista on this computer. You need to identify which hardware component fails to meet the minimum hardware requirements. Which hardware component should you choose?()
A、memory
B、processor
C、hard disk
D、video adapter
论述防护林及草皮缺失率的检查计算。