ARDS动脉血氧分压/吸入氧分数值(PaO2/FiO2)的诊断标准为
A.≤150
B.≤200
C.≤300
D.≤400
E.≤500
参考答案:B
—What else shall I do,Mr. Simpson?
— letters arriving while I am away should be sent to my address in Florida.
A.Any
B.Some
C.Few
D.Many
如图是实验室有关氧气制备、收集、验满、验证性质的操作,其中正确的是 [ ]
A.
B.
C.
D.