题目

任务型阅读Autumn is a good time for children to go outside and see the different colors of nature. The wind is cool. The days are short and the leaves are changing colors. Autumn is a great season for kids to play outside. What outdoor activities do children like?In China, students often have a picnic with their classmates. Usually, they will go to parks or to the places that are close to nature.What kinds of autumn activities are there for children in other countries?Japanese students often go hiking. It is a good way to get exercise while enjoying the outdoors. Mountain climbing in nice一定量的浓硝酸和过量的铜充分反应，产生的气体有 ① NO2        ② NO        ③ NH3        ④ H2 A．只有①      B．①②       C．①③     D．①②④