船舶发生各种应急情况后,船长应()。
A.首先检查是否人员伤亡并救治
B.检查本船受损情况,判断是否需要救助
C.根据情况,决定是否需要弃船
D.ABC都正确
参考答案:D
They were so far away that I couldn't ______ their faces clearly. [ ]
A. make for
B. make up
C. make of
D. make out
职业性有害因素按其性质可以分为()。
A.3类
B.4类
C.5类
D.6类
E.7类