下列有关氧气的用途中,体现供给呼吸性质的是( )
A.富氧炼钢
B.医疗急救
C.液氧炸药
D.焊接金属
答案:B
缺血再灌注损伤最常见于()
A.心
B.脑
C.肺
D.肾
The quartermasters()steer the ship and help the officer keep lookout.
A.duty
B.on duty
C.at duty
D.in duty