题目

阅读理解Hereare four fantastic experiences for you to enjoy wonderful countryside spots,breath­taking scenery and clean, fresh air. Pack your bags and get outside!Horse­ridingHere'sa novel way of chasing the Northern Lights—on horseback, which is aback­to­nature experience hunting for the aurora borealis. You'll saddle up (给马备鞍) at dusk and head deeper into the wilds near thePallas Yllas National Park. GO:Three­night full­board guided trip, including two nights in a cottage and onenight glamping, from ￡965 per person. See aurora zone. com. Mountain­bikingYoucan choose fr物质的用途与性质密切相关．下列说法错误的是（　　） A、氮气可作焊接金属的保护气--氮气的化学性质不活泼B、干冰可用于进行人工降雨--干冰升华时吸热C、一氧化碳用于冶炼金属--一氧化碳有可燃性D、用二氧化碳灭火--二氧化碳密度比空气大，不能支持燃烧