【单选题】如果统外旅游者打算购买出境时要进行检查的物品,地陪应告知我国()的有关规定
【多选题】有关吐温类和司盘类表面活性剂的说法正确的是( )
C.
司盘类亲油性强,常用作润湿剂、W/O型乳化剂
【判断题】This is an essay aimed at promoting tourism.
【判断题】Primary aim of tourism is to deliver an enjoyable & memorable travel experience so that people will want to come back again.
【单选题】Is green tourism an approach to tourism development which seeks to develop a symbiotic relationship with the physical and social environment on which it depends?
【单选题】乙酰胆碱舒张血管作用的机制是:
A.
.激动血管内皮细胞上M 3 受体,促进NO释放