产后出血是指 * * 流血量在胎儿娩出后24小时内超过()。
A.300ml
B.400ml
C.500ml
D.600ml
E.700ml
参考答案:C
To fetch water before breakfast seemed to me a rule__________.[ ]
A. to never break
B. never to be broken
C. never to have broken
D. never to be breaking
金葡菌肺炎患儿突然出现呼吸困难、憋气。应首先考虑()
A.肺炎加重
B.心力衰竭
C.脓气胸
D.肺部多发的小脓肿
E.化脓性胸膜炎