题目

BestSchool Backpacks Students of all ages need to have a reliable backpack and which is your favourite one? 1. Amazon Basics Classic Backpack     The Amazon Basics line of products aims to deliver outstanding value bygetting rid of everything that is unnecessary while keeping the most important function that customers desire. The Classic Backpack may not look likemuch,but that is a big part of its appeal. It’s cheap and cheerful,lightweight yet long-lasting with velcro（尼龙刺粘搭链）side pockets and a large center. With an average rating of 4.5 stars based on over 250 cust8．四省级行政单位中，纬度最高的是（　　）A．①B．②C．③D．④