题目

请认真阅读下面短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。注意:每个空格只填1个单词。Timefor Americans to act on climate change The climate crisis is worsening at arate that is becoming harder and harder to ignore. For more than two decades,scientific reports have made it clear that global warming is real, that humanscause it and that the consequences will be disastrous. The scientific community has becomeincreasingly panicked over the past year. The latest assessment from the U.N.Intergovernmental Panel on Climate Change painted 如图是表示物质粒子的示意图，图中“．”和“?”分别表示  两种不同元素的原子，其中表示混合物的是（ ）A．甲和丙B．乙和丁C．只有甲D．只有丙