题目

下列物质中不能与碳酸钠溶液发生反应的是（ ）A.Ca（OH）2溶液B.稀H2SO4C.BaCl2溶液D.KNO3溶液 答案：【答案】D【解析】A、碳酸钠溶液与Ca（OH）2溶液反应生成白色沉淀碳酸钙，故选项错误；B、碳酸钠与稀H2SO4反应有气泡生成，故选项错误；C、碳酸钠与BaCl2溶液反应生成白色沉淀碳酸钡，故选项错误；D、碳酸钠与KNO3溶液混合，无沉淀、无气体、无水生成，因此不反应,故选项正确；故选：D。 Do you love holidays but hate the increase weight that follows? You are not alone.Holidays are happy days with pleasure and delicious foods. Many people, however, are worried about the weight that comes along with the delicious foods.With proper planning, though, it is possible to control your weight. The idea is to enjoy the holidays but not to eat too much. You don’t have to turn away from the foods that you enjoy. The following suggestions may be of some help to you.Do not miss meals. Before you leave home for a feast, have a small, low-fat snack. This may help to keep you from getting too excited before delicious foods.Begin with clear soup, fruit or vegetables. A large glass of water before you eat may help you feel full. Use a small plate; a large plate will encourage you to have more than enough.Better not have high-fat foods. Dishes that look oily or creamy have much fat in them.Choose lean meat. Fill your plate with salad and green vegetables.If you have a sweet tooth, try mints and fruit. They don’t have fat content as cream and chocolate.Don’t let exercise take a break during the holidays. A 20-minute walk after a meal can help burn off excess calories.【1】Holidays are happy days with pleasure but they may ________.A.bring weight problemsB.bring you much trouble in your lifeC.make you worry about your foodsD.make you hate delicious foods【2】In order to really enjoy your holidays without putting on weight, you’d better ________.A.drink much water and have vegetables onlyB.not eat much food in high fatC.not accept invitations to feastsD.turn away from delicious foods【3】According to the passage, ________ is a necessary part to stop you from putting on weight.A.clear soupB.waterC.calories of energyD.physical exercise【4】Many people can’t help putting on weight after the holidays because they ________.A.can’t control themselvesB.go to too many feastsC.enjoy delicious foodsD.can’t help turning away from the foods