造成“人间四月芳菲尽，山寺桃花始盛开”的主要原因是[ ]
A．地形地势
B．人类活动
C．海陆分布
D．纬度因素
答案：A
A station in the mobile service the emissions of which are intended to facilitate search and rescue operations is（）.
A.EPIRB
B.SART
C.Mobile Station
D.Distress Alerting
依据GB50204同条件试件的留置规定？
