The older the general is, ____________（他越热爱生活).

The older the general is, ____________(他越热爱生活).

答案

查看答案

发布时间：2020-08-25

更多“The older the general is, ____________（他越热爱生活).”相关的问题

第1题

根据以下材料，回答题Older Volcanic EruptionsVolcanoes were more destructive in ancient hist

根据以下材料，回答题

Older Volcanic Eruptions

Volcanoes were more destructive in ancient history， not because they were bigger， but because the carbon dioxide they released wiped out life with greater ease.

Paul Wignall from the University of Leeds was investigating the link between volcanic eruptions and mass extinctions. Not all volcanic eruptions killed off large numbers of animals， but all the mass extinctions over the past 300 million years coincided with huge formations of volcanic rock. To his surprise， the older the massive volcanic eruptions were， the more damage they seemed to do. He calculated the "killing efficiency" for these volcanoes by comparing the proportion of life they killed off with the volume of lava that they produced. He found that for size， older eruptions were at least 10 times as effective at wiping out life as their more recent rivals.

The Permian extinction， for example， which happened 250 million years ago， is marked by floods of volcanic rock in Siberia that cover an area roughly the size of western Europe. Those volcanoes are thought to have pumped out about 10 gigatones of carbon as carbon dioxide. The global warming that followed wiped out 80 percent of all marine genera at the time， and it took 5 million years for the planet to recover. Yet 60 million years ago， there was another huge amount of volcanic activity and global warming but no mass extinction. Some animals did disappear but things returned to normal within ten thousands of years. "The most recent ones hardly have an effect at all，" Wignall says. He ignored the extinction which wiped out the dinosaurs 65 million years ago， because many scientists believe it was primarily caused by the impact of an asteroid. He thinks that older volcanoes had more killing power because more recent life forms were better adapted to dealing with increased levels of CO2.

Vincent Courtillot， director of the Paris Geophysical Institute in France， says that Wignall"s idea is provocative. But he says it is incredibly hard to do these sorts of calculations. He points out that the killing power of volcanic eruptions depends on how long they lasted. And it is impossible to tell whether the huge blasts lasted for thousands or millions of years. He also adds that it is difficult to estimate how much lava prehistoric volcanoes produced， and that lava volume may not necessarily correspond to carbon dioxide emissions.

Why did older volcanic eruptions do more damage than more recent ones？查看材料

A.Because they killed off life more easily.

B.Because they were brighter.

C.Because they were larger.

D.Because they were hotter.

点击查看答案

第2题

Blasts from the Past 1．Volcanoes were destructive in ancient history. Not because they wer

Blasts from the Past

1．Volcanoes were destructive in ancient history. Not because they were bigger, but because the carbon dioxide they released wiped out life with greater ease.

2．Paul Wignall from the University of Leeds was investigating the link between volcanic eruptions and mass extinctions. Not all volcanic eruptions killed off large number of animals, but all the mass extinction cover the past 300 million years coincided with huge formations of volcanic rock. To his surprise, the older the massive volcanic eruptions were, the more damage they seemed to do.

3．Wignall calculated the "killing efficiency" for these volcanoes by comparing the proportion of life they killed off with the volume of lava that they produced. He found that size for size, older eruptions were at least 10 times as effective at wiping out life as their more recent rivals.

4．The Permian extinction, for example, which happened 250 million years ago, is marked by floods of volcanic rock in Siberia that cover an area roughly the size of western Europe. Those volcanoes are thought to have pumped out about 10 gigatonnes of carbon as carbon dioxide. The global warming that followed wiped out 80 per cent of all marine genera at the time, and it took 5 million years for the planet to recover.

5．Yet 60 million years ago in the late Palaeocene there was another huge amount of volcanic activity and global warming but no mass extinction. Some animals did disappear but things returned to normal within ten thousands of years. "The most recent ones hardly have an effect at all," Wignall says. He ignored the extinction which wiped out the dinosaurs at the end of the Cretaceous, 265 million years ago, because many scientists believe it was primarily caused by the impact of an asteroid.

6．Wignall thinks that older volcanoes had more killing power because more recent life forms were better adapted to dealing with increased levels of CO2. Ocean chemistry may also have played a role. As the supercontinents broke up and exposed more coastline there may have been more weathering of silica rocks. This would have encouraged the growth of phytoplankton in the oceans, increasing the amount of CO2absorbed from the atmosphere.

7．Vincent Courtillot, director of the Paris Geophysical Institute in France, says that Wignall's idea is provocative. But he says it is incredibly hard to do these sorts of calculations. He points out that the killing power of volcanic eruptions depends on how long they lasted. And it is impossible to tell whether the huge blasts lasted for thousands or millions of years.

8．Courtillot also adds that it is difficult to estimate how much lava prehistoric volcanoes produced, and that lava volume may not necessarily correspond to carbon dioxide or sulphur dioxide emissions.

A．Killing Power of Ancient Volcanic Eruptions

B．Association of Mass Extinctions with Volcanic

C．Calculation of the Killing Power of Older Eruptions

D．A Mass Extinction

E．Volcanic Eruptions That Caused No Mass Extinction

F．Accounting for the Killing Power of Older Eruptions

Paragraph 2______

点击查看答案

第3题

Genera has inereased the numher of its employees reeently． A．Right B．Wrong C．No

Genera has inereased the numher of its employees reeently．

A．Right