题目8单选题
大气中主要温室气体之一,其浓度近年来显著上升,对全球变暖起重要作用的是A. 氧气 <img src="https://tihai-oss-cloud.itihey.com/img/b3f8a0222f82e1e1c6d48f69ea2425b5.png">B. 氮气 <img src="https://tihai-oss-cloud.itihey.com/img/ec8a4a7a719d680bfa78f9e7aa618891.png">C. 臭氧 <img src="https://tihai-oss-cloud.itihey.com/img/83ff0c8750c3d7712b18a86e5477c968.png">D. 二氧化碳 <img src="https://tihai-oss-cloud.itihey.com/img/f2497b4127ec4c0a2e16e4d671c5ec20.png">