产褥感染、流产后感染的主要途径是()。
A.沿黏膜上行蔓延
B.经血液循环播散
C.经淋巴系统蔓延
D.直接蔓延
E.种植
参考答案:B
What are the symptoms of sun stroke?()
A.Temperature falls below normal,pulse is rapid and feeble,skin is cold and clammy
B.Temperature is high,pulse is p and rapid,skin is hot and dry
C.Temperature is high,pulse is slow and feeble,skin is clammy
D.Temperature falls below normal,pulse is rapid,skin is clammy
在始发、终到及换挂机车的车站到发线停留的客车底,停留时间超过()或线路坡度超过1.5‰时,须按规定采取防溜措施。
A.0.5h
B.1h
C.1.5h
D.2h