下面漫画现象中的主人公如果是你的同学，你认为用下列哪些观点劝诫他比较好（  ）

①自立自强   ②扶贫济困   ③无私奉献   ④勤俭节约

    There are many different ways to travel to Paris from London. One of the quickest and most popular ways is by train. From Waterloo Railway station, you can travel all the way to Paris. The journey takes about three hours. The train, called the Eurostar, is very modern, and the seats are comfortable.
    You can also travel to France by ship. First, you go to Dover, on the coast (海岸), by bus from London. The bus stops at the Ferry Terminal Seven in Dover. You can buy your tickets there. People who travel by car can drive on to the ferry (渡轮), too.
Another way to travel to Paris is by plane. There are several airports with international flights to Paris and other cities in France. You can travel to London Airport by bus or underground. Some people even go by taxi but this is a very expensive way to travel!

近年来，某市建设了l20多座“漂流书亭”，投放书籍7万多册，用“带一本书来，换一本书走”的方式，让该市“满城书香”。这一举措旨在（    ）

如图，直线a，b被直线c所截，若a∥b，∠1=110°，则∠2等于（　　）