仪表着陆系统、全向信标、测距设备、无方向信标等导航设备应在投入使用第()年启动更新改造项目。
A、7
B、9
C、11
D、13
参考答案:D
The recent conference on the effective use of the seas and oceans was another attempt resolving major differences among countries with conflicting interests.()
A. resolve
B. resolves
C. to resolve
D. being resolved
承重外墙的定位轴线距顶层墙身内缘100mm,内墙的定位轴线一般与墙体中心线重合。