题目

物质处于千变万化中，下列有关叙述中属于化学变化的是（） A . 铁在潮湿的空气中生锈 B . 盐酸挥发 C . 用体温计测量体温 D . 水变蒸汽 答案：AHow to plan for a perfect holidayPeople often dream of a perfect holiday with white sands, blue beaches and so on. But sometimes planning a trip can be difficult. Here are some tips to make your holiday a memorable one.● Set a budget. Before making a plan for the holiday, the most important thing is to plan how money will be spent. 【1】● Plan ahead. The first thing you need to do is to be sure of what you need from this trip. Do you want to experience the local culture or just have fun on those sandy beaches? 【2】● Read up before you go. 【3】. Buy a good guidebook and read up on the culture, history, local attractions of the place. You can also surf the internet for more information. The more you know, the better you can enjoy the place and its traditions.● Pack light and right. 【4】 Avoid carrying unnecessary things around. A heavy luggage may sometimes influence your holiday spirit. Carry clothes that are comfortable and right for the season. Try to put everything you need in a single carry-on bag.● 【5】 Unreasonable expectations can lead to a lot of stress. So enjoy each moment, whether good or bad.A. You had better look for information before visiting an unknown holiday place.B. All you need is to get away from busy people and the world.C. Always book your stay.D. Have realistic expectations.E. It helps you to plan and enjoy the trip within your limits of money.F. Pack only the important things.G. You can plan your trip according to your needs and likes.