下列属于船长保障人员安全的责任有:①船舶安全航行的责任②定期进行的应变或应变演习中的总指挥责任⑧签订救助合同的责任()
A.①
B.②
C.⑧
D.①②
参考答案:B
I didn't notice you _____ a box when you came in. [ ]
A. is carrying
B. carrying
C. to carry
如患者出现无尿,24h尿量应少于多少
A.1000 ml
B.500 ml
C.400 ml
D.100 ml
E.50 ml