旅游产品出口方面，通常不存在客源国的关税壁垒问题。
参考答案：对
It will be a big help if you go to the store and get what we need for dinner._____, I’ll set the table.
A．As a result
B．On the whole
C．In the meanwhile
D．As a matter of fact
多项式2x3-x2y2-3xy+x-1的次数是______．
