【单选题】The number of adult smokers may be ________, but smokers between the ages of 13 and 23 have actually increased by 10 percent over the last 10 years.
【单选题】《安定城楼》和杜牧的《题宣州开元寺水阁》都表达了作者对()的人生轨迹的向往。
【判断题】批发商品异地销售一般采用提货制和送货制。
【多选题】以下哪些外链会影响到网站的权重和收录( )