氧气瓶阀、氧气减压器、焊炬、割炬氧气皮管等应严禁沾染上易燃物质和油脂。( )
参考答案:对
-How can we get to the airport? It’s too far and too expensive to take a taxi.
-Don’t worry. There is a ________bus service to the airport.
A.regular
B.general
C.normal
D.Usual
()是旅游产品生产的基础,是旅游目的地供给的重要组成部分。
A.旅游设施
B.辅助性旅游供给
C.旅游资源
D.公用事业设施