题目

The most enjoyable way to discover Liverpool is by boat. The first thing to do is to take a ferry across the River Mersey. It's the best way to find out about this city's long and interesting history. The Liverpool Ferry，which is the oldest ferry service in Europe，started more than 800 years ago. In the 18th century Liverpool became an important city for international business across the Atlantic Ocean. Ships sailed from Liverpool to the United States and Africa. The place to learn more about Liverpool's importance is the Maritime Museum. But there's more to see and do in Liverpoo1.5．有关物质的用途正确的是（　　）A．氢氧化钙用于治疗胃酸过多B．氧气用作火箭燃料C．胆矾用于检验水D．食盐溶液用于消毒杀菌