今有一混合物的水溶液，只可能含有以下离子中的若干种：Na⁺、NH₄⁺、Ba²⁺、Cl^﹣、CO₃^2﹣、SO₄^2﹣．现取两份200mL溶液进行如下实验：①第一份加足量NaOH溶液，加热，有气体产生；②第二份加足量BaCl₂溶液后，得干燥沉淀，经足量盐酸洗涤、干燥后，沉淀质量减轻．根据上述实验，以下推测正确的是（　　）

反应：2A(g)＋B(g)2C(g)，当平衡向正方向移动时，下列说法一定正确的是

经济建设、政治建设、文化建设、社会建设、生态文明建设着眼于全面建成小康社会、实现社会主义现代化和中华民族伟大复兴，党的十八大报告对推进中国特色社会主义事业作出“五位一体”总体布局。“十二五”期间我国建设生态文明，开创了环境保护工作新局面。请联系下边漫画判断，正确的是 （    ）

①建设生态文明必须实施可持续发展战略

②建设生态文明须坚持保护环境和节约资源的基本国策

③建设生态文明坚持消耗为主，节约、保护为辅的方针

④建设生态文明要坚持科学发展观，加大节能减排力度

阅读理解

Airport Express

    With the Airport Express, you are never far from town. There is a train every 10 minutes, ready to rush you between the airport and Hong Kong Station in the heart of the shopping and downtown district in about 24 minutes. Or travel to the Asia World-Expo in just 1 minute from the airport.

Airport Express service hours

Mon.-Fri.: 5:50am to 1:15am

Sat.-Sun.: 5:00am to 2:00am

Tickets

    There are three types of ticket for travelling to and from the Airport: Single Journey, Round Trip and Same Day Return. Single Journey Ticket and Same Day Return Ticket are valid(有效的) on day of issue(发放). Round Trip Ticket is valid for 30 days from day of issue. You can also use the Octopus Card for the Airport Express. (The Octopus Card is an electronic store-value ticket and it can be used on most public transport. The fare will be deducted(扣除) from the stored value each time, so you do not have to carry heavy coins. The card is valid for three years after value has been added.)

Travel tips

Children under 3 travel for free.

    Passengers travelling on the Airport Express are now able to write email and do online searches with Wi-Fi service.

    For more information about Airport Express, please visit www.hongkongairport.com or call 00852-21818888.