9+99+999+9999+99999的值是( )
A.111105
B.111100
C.119905
D.119990
参考答案:A
外径千分尺固定套筒上露出的读数为15.5mm,微分筒对准基准线数值为37,则整个读数为()。
A.15.87mm
B.15.37mm
C.19.20mm
D.52.5mm
The Network Coordination Station for the INMARSAT-A coast stations in the Pacific ocean region is in().
A.Yamaguchi, Japan
B.Beijing, China
C.Nakhodka, Russia
D.Perth, Australia