题目

Here is our 5-day travel programme (旅行方案). I'm sure you will enjoy your trip．Day 1 — Arrive in BeijingArrive in Beijing in the morning. The guide will meet you in the airport and he will take you to the hotel. You will visit the National Science Museum. It will take you about one hour to go there by car.Day 2 — BeijingAfter breakfast, you will go to Tian'anmen Square. You will stay there for one hour and then you'll go to the Palace Museum.Day 3 — BeijingThe most important part is a visit to the Great Wall. It is one of the most important symbols in China, and many people visit下列鉴别物质的方法中，错误的是A．用燃着的木条鉴别氧气和二氧化碳 B．用硝酸银溶液鉴别稀盐酸和食盐水C．用水鉴别碳酸钙粉末和碳酸钠粉末 D．用灼烧的方法鉴别棉布和丝绸