题目

下表各组物质之间通过一步反应不可以实现如下图所示转化关系的是 选项XYZ箭头上所标数字的反应条件 AFeFeCl2FeCl3④ 加入铁粉 BAlCl3NaAlO2Al(OH)3② 通入CO2 CCaOCa(OH)2CaCO3① 常温遇水 DCl2Ca(ClO)2HClO③ 加浓盐酸   答案：C解析: Where do you go on a school trip every spring? In the UK, students go to many great places. They see swans and ducks in wetlands. They pick up shells (贝壳) at the seaside.In Japan, cherries (樱花) are blooming (盛开的) by the beginning of April. Kids have picnic lunches, sing karaoke (卡拉OK) and dance under the trees. They also go boating and hiking. They take baths in hot springs (温泉).In China, kids often take school trips in parks, museums or to a mountain. These days, outward bound (野外扩展) trips are very popular. Kids can learn about survival skills (生存技巧) and teamwork during these trips.School trips can be great fun. But don’t get hurt when you travel outdoors. Here are some tips for you.Listen to your teacher. On the bus, always wear a seat belt (安全带) if the bus has them. Do not rush or push when you get on or off the bus. Stay in your seat while the bus is moving. If you are at the zoo, remember not to touch or go near animals. If you are careful enough, you will have fun.根据短文内容，完成下列表格(每格只能填一个词)。Students in different1.go to different placesIn the UK, students go to wetlands or to the2.and many places.In Japan, kids do activities under the trees, they also go3.and hiking. They take baths in hot 4..In China, kids take school trips in parks, 5.or to a mountain.The tips for not 6. hurtListen to your teacher. On the bus, always7. a seat belt. Do not rush or push when 8. on or off the bus. Stay in your seat9.the bus is moving. If you are at the zoo, don’t10. not to touch or go near animals.