已知a，b是实数，且3a+4+b2-6b+9=0，则ab=______；已知xy 发布时间：2017-04-14 20:54 │ 来源：www.tikuol.com 题型：填空题 问题： 已知a，b是实数，且3a+4+b2-6b+9=0，则ab=______；已知xy=3，则xyx=______．
题型：填空题 阅读理解。 Holidays Holiday News Vacancies (空位) now and in the school holidays at a country hotel inDevon. This comfortable, friendly home-from-home lies near the beautifulquiet 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 Center The Snowdonia Center for young mountain climbers has a mountainlesson. The beginners' costs are ￡57 for a week, including food and rooms. Equipment is included except walking shoes, which can be hired at a lowcost. 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 lifetime of mountainclimbing adventure. The World Sea Trip of a Lifetime Our World Sea Trip of 2008 will be unlike any holiday you have everbeen 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 andwake 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 ourwonderful 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 sport 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. foodB. rooms C. body exercisesD. walking shoes 查看答案