题目：
On receipt of a distress alert, the SAR units ashore and at sea will（）soonest.
A.coordinate in rescue operation
B.send rescue vessels
C.reach the area at once
D.conduct a sector search
答案：
参考答案：A
On receipt of a distress alert, the SAR units ashore and at sea will（）soonest.
A.coordinate in rescue operation
B.send rescue vessels
C.reach the area at once
D.conduct a sector search
参考答案：A
