下列有关实验装置进行的相应实验，能达到实验目的的是 图1图2图3图4 A．用图1

产品合格率=______．

Astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost（1）. For example,the maintenance of multiple networks can require additional staff.often,this staff must be trained on multiple vendor technologies,sometimes requiring parallel groups specializing in each（2）hence,additional maintenance procedures must be maintained and administrative records are（3）the duplication of trasport facilities to carry（4）network traffic is an inefficient use of resources and,not surprisingly,more technologies installed in a central office mean the necessity for more physical space,and an increase in power connections and power consumption.migration of these（5）network elements to IP-based DCns is alogical strategy

4（）

A.overlook 

B.overlie 

C.overlay 

D.overleap

发电厂采用计算机监控系统后，操作员站台宜保留的硬手操包括( )。

A．发电机变压器组断路器紧急跳闸按钮、发电机灭磁开关紧急跳闸按钮、柴油发电机启动按钮；
B．发电机变压器组断路器紧急合闸和跳闸按钮、发电机灭磁开关紧急合闸和跳闸按钮、柴油发电机启动按钮；
C．发电机变压器组断路器紧急跳闸按钮、发电机灭磁开关紧急跳闸按钮、高压厂用工作变压器高压侧断路器紧急跳闸按钮、启动备用变压器高低压侧断路器紧急合闸按钮；
D．发电机变压器组断路器紧急合闸和跳闸按钮、发电机灭磁开关紧急合闸和跳闸按钮。

《征地区片综合地价测算指导性意见(暂行)》规定，一个市(县)的征地区片价原则上控制在( )个级别。

A．1～3

B．4～6

C．5～7

D．6～8

气陷证是（）证的发展；因失其升举之能，故见（）