【单选题】The route of transmission of measles is
B.
digestive tract transmission
C.
transmission of airborne droplets
D.
transmission by skin contact
E.
insect-borne transmission
【简答题】电压继电器有过电压和欠电压两种。一般都采用电磁式,与电流继电器不同之处在于,电压继电器的()且()。
【单选题】Which of the following transmission line can be considered as a medium transmission line?
A.
Transmission line of length up to 600 km
B.
Transmission line of length up to 500 km
C.
Transmission line of length up to 200 km
D.
Transmission line of length up to 80 km
【单选题】Which of the following is not the transmission route of NCP?
【简答题】Both mother-to-child transmission and partner-to-partner transmission can be pred or protected effectively by drugs for ______.
【多选题】What are the transmission routes of NCP?
C.
fecal-oral transmission
【简答题】传播途径(route of transmission)