男性,50岁。咯血200ml后突然窒息,应立即采取的措施是().
A.输血
B.吸氧
C.去除呼吸道梗阻
D.静滴呼吸兴奋剂
E.推注垂体后叶素
参考答案:C
1 often take a bus to school, but _____I go to school by bike.
A.some time
B.sometime
C.some times
D.sometimes
微机的USB设备支持热插拔和即插即用,使用时不需要关闭微机电源。()