中国经济发展正处于提质增效的关键时期，需要在适度扩大总需求的同时，着力加强供给侧结构性改革，在优化结构中实现转型升级、良性循环，增强发展的可持续性。

材料一：长期以来，W市税收、土地、资源、价格等政策机制侧重于鼓励工业发展，且金融、养老、医疗、教育等服务业发展还面临市场准入方面的障碍，导致该市服务业发展相对滞后。近年来，面对经济持续下滑的现状，该市没有再出台大规模的经济刺激计划，而是通过简政放权，取消或下放多项行政审批项目，探索设立自由贸易区，鼓励创新创业，激发市场内生活力等手段，不断优化配置服务业发展的各种生产要素，矫正服务业要素配置扭曲，扩大服务业的有效供给，提高供给结构对市场需求变化的适应性和灵活性，提高全要素生产率，更好地满足了广大人民群众的需求，在逆境中实现了服务业的快速增长，进而促进了经济社会持续健康发展。

材料二：为进一步推进供给侧结构性改革，W市市委组织专班分赴全市各地展开实地调研。针对调研中发现的新问题，市委认真听取了政协委员、各民主党派和广大群众的意见，深化了对供给侧结构性改革的认识。

关于对经线的叙述，正确的是（  ）

C

    Shopping on the Internet is becoming more and more popular. Why do people use the Internet to shop? Some people say it is more convenient. They don't have to leave their homes to order something;    ①   ; they can find things for sale that they can't find in the stores near their homes.  ②   .

    If you want to buy something on the Internet, you need a credit(信用) card. You have to type your credit card number and information on the website and send them to the store over the Internet. You have to be sure that the store will not use your information in the wrong way. You don't want someone to get your credit card number, so be careful with it, because people sometimes steal credit card numbers from stores.

    The Internet is also a good place to go window-shopping. Window-shopping is when you look at the things for sale in a store, but don't plan to buy anything. In window-shopping you can see what kinds of things you are able to get and how much they cost. Some stores like Ross Stores have a website for information about their stores, but not for shopping. Some stores have a website for information about their stores, and can shop on-line there, such as Office Depot, Payless Shoe Source, Safeway. Some stores like Amazon. com are only for on-line shopping.