题目内容：
“南极臭氧空洞不断缩小”这一现象说明（）
A.大气对人类排放的有害气体的自净能力增强
B.人类已经不必关心臭氧空洞等环境问题
C.环境与发展问题得到国际社会的普遍关注
D.50年后，全球变暖等大气环境问题都将得到解决
参考答案：
选择题：“南极臭氧空洞不断缩小”这一现象说明（）
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
- 查看权限：VIP
The （）proposal seeks money from a government agency, foundat
The （）proposal seeks money from a government agency, foundation, or other funding source for a specified project.这是一个关于英
Unsolicited proposals are those that have been requested by
Unsolicited proposals are those that have been requested by the audience.这是一个关于英文技术写作的相关问题，下面我们来看
（）reports answer the question “Here’s what we should do and
（）reports answer the question “Here’s what we should do and why”.这是一个关于英文技术写作的相关问题，下面我们来看
Which of the following pages are NOT numbered except （）?
Which of the following pages are NOT numbered except （）?这是一个关于英文技术写作的相关问题，下面我们来看
The author believed that lower class people, regardless of t
The author believed that lower class people, regardless of their gender, had to work hard to make a living.这是一个关于大学英语综合教