Older Volcanic Eruptions

50. Older Volcanic Eruptions（综A）
1) Why did older volcanic eruptions do more damage than more recent ones?
2) How did Wignall calculate the killing power of those older volcanic eruptions?
3) When did dinosaurs become extinct?
4) What can be inferred from paragraph 3 concerning dinosaurs?
5) What is the main thesis of the article?

50. Older Volcanic Eruptions（综A）
1)Because they killed off life more easily.
2)By comparing the proportion of life wiped out with the volume of lava produced.
3)65 million years ago.
4)The cause of their extinction has remained a controversial issue.
5) Older volcanic eruptions were more destructive.

远古火山爆发

远古火山爆发（综A）
① 为什么远古火山爆发的破坏（程度）高于（新）火山？
② Wignall如何计算远古火山爆发的杀伤力的？
③ 恐龙什么时候灭绝的？
④ 第三段关于恐龙可以推断出的是_____________
⑤ 这篇文章的主题是_____________。

远古火山爆发（综A）
①因为他们更容易毁灭生命
②通过对比毁灭的生命的比例与产生的岩浆的量
③6500万年前
④灭绝的原因仍然是个有争议的问题
⑤远古火山爆发更具破坏性