机动车在夜间行车,在窄路、窄桥与非机动车会车时,如何正确使用灯光()。
A.应当使用近光灯
B.关闭近光灯,改用示廓灯
C.始终使用远光灯
参考答案:A
镉试剂2B.分光光度法测定水中银时,试样中有NA.2EDTA.存在的条件下,阳离子一般均无干扰。
On which vessels is GMDSS required? ()
A.All vessels capable of international voyages
B.Vessels operating outside of the range of VHF coastal radio stations
C.SOLAS Convention ships of 300 gross tonnage or more
D.Coastal vessels of less than 300 gross tons