安装有二氧化碳气体灭火系统的防护区内必须配备有专用的空气呼吸器或氧气呼吸器。
参考答案:对
中比例尺地形图由国家专业测绘部门负责测绘,一般采用( )测绘。
A.航空摄影测量方法
B.平板仪
C.经纬仪或全站仪
D.GPS
Cindy is ______six-year-old girl and she has become famous since her _______first appearance in the show Where Are We Going, Dad?
A.a, the
B.a, /
C.the, the
D.the, /