题目

现有A、B、C、D、E、F六种短周期元素，它们的原子序数依次增大。A与D、C与E分别同主族，D、E、F同周期，B原子的最外层电子数是内层电子数的2.5倍，A与C形成的常见化合物在常温下为液态。 （1）元素A 在周期表中位于第_____周期_____族；B、C、E三种元素中非金属性最强的是____（填元素符号）。 （2）常温下，F的单质能与由A、C、D三种元素组成的一种常见化合物发生反应，该反应的化学方程式为____________________。 （3）E与F的最简单气态氢化物中稳定性Holiday Holiday News    Vacancies (空位) now and is the school holidays at a country hotel in Devon. This   comfortable, friendly home-from-home lies near the beautiful quiet countryside, but just a drive away from the sea. The food is simple but good. Children and pets are welcome Reduced prices for low season. The Snowdonia Centre    The Snowdonia Centre for young mountain climbers has a mountain climbing loss The beginners’ costs are 157 for a week, including food and rooms. Equipment is included except walking shoes, which can be hired at a low cost.     You must be in good health and prepared to go through a period of body exercises. This could be the beginning of a lifetime of mountain climbing adventure. The World Sea Trip of a Lifetime    Our World Sea Trip of 2008 will be unlike any holiday you have ever been on before. Instead of one hotel after another, with all its packing and unpacking, waiting and traveling. You just go to bed in one country and wake up in another.    On board the ship, you will be well taken care of. Every meal will be first-class and every cabin like your home.    During the trip, you can rest on deck (甲板), enjoy yourself in the games rooms and in the evening dance to our musical team and watch our wonderful play.    You will visit all the places most people only dream about-from Acapulco and Hawaii to Tokyo and Hong Kong.    For a few thousand pounds, all you’ve ever hoped for can be yours. 1. What can you do if you like to go on holidays with pets?    A. Choose the holiday in Devon.                          B. Go to the Snowdonia Centre.    C. Join the World Sea Trip of 2008.                     D. Visit Acapulco and Hawaii. 2. In what way is the Snowdonia Centre different from the other two holidays?    A. It provides chances of family gatherings.    B. It provides customers with good food.    C. It offers a ports lesson.    D. It offers comfortable room. 3. What is special about the World Sea Trip of 2008?    A. You can have free meals on deck every day.    B. You can sleep on a ship and tour many places.    C. You will have chances to watch and act in a play.    D. You have to do your own packing and unpacking. 4.  At the Snowdonia Centre, the beginners’ costs of ￡57 do not cover           .    A. food                   B. rooms               C. body exercises                 D. walking shoes