国务院总理***10月1 9日在北京出席首届“全国大众创业万众创新活动周”，并考察主题展区。为推动实施创新驱动发展战略、展示“双创”成果、提供平台促进创业创新要素聚集对接，在全社会营造良好氛围，经国务院批准，从今年开始举办“全国大众创业万众创新活动周”。期间，北京、沈阳、上海、合肥、武汉、深圳、成都、西安等城市将同步开展形式多样的系列活动。此举（    ）

①有利于为创业创新者营造良好的市场环境，激发市场活力和创造力

②将促进传统产业改造升级，也会推动现代服务业等新业态加快成长

③完善了“双创”需要的服务供给，清除了制约“双创”的体制障碍

④为促进非公有制经济不断创新、平等参与市场竞争提供了重要的制度保证

下列各句中，没有错别字的一项是                                (　　)

This is my school. There are many trees and flowers in it. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room.
There are 1,200 students in 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too.