【多选题】
{$mediaurl} The professor explained many direct causes of the mass extinctions that were supposedly produced by the K-T asteroid impact. Indicate which causes are mentioned in the lecture.Click in the correct box for each phrase.
YES | NO | |
| A、An increase in greenhouse gas levels. | ||
| B、Debris covering the whole surface of theEarth. | ||
| C、A、massive cloud of dust that blocked sunlight. | ||
| D、Intense blazes across the worlD、 | ||
| Ｅ.A、lack of oxygen in the atmosphere. |
网考网参考答案：YES → A、C、D/NO → B、E
网考网解析：
暂无解析 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
发布评论 查看全部评论