虱传流行性回归热
A．受染昆虫粪便污染伤口B．含病原的昆虫体液污染伤口C．两者均可D．两者均不可
参考答案：B
Attention, please! ________ for your luggage on the train or the bus![ ]
A. Break out
B. Turn out
C. Watch out
D. Come out
