單項選擇題
A.27'.0 B.30'.0 C.30'.6 D.31'.0
A.132'.6 B.137'.0 C.141'.3 D.145'.7
A.0'.0 B.+2'.0 C.-2'.0 D.視海區(qū)內(nèi)風、流方向而定
A.無風流 B.有風無流 C.有流無風 D.有風流
A.0'.0 B.1'.0 C.2'.0 D.無法確定
A.127'.8 B.131'.5 C.135'.2 D.138'.9