更多"By contrast, American mothers were "的相关试题:
[填空题]By contrast, American mothers were more likely to__________________(把孩子的成功归功于) natural talent.
[填空题]By contrast, American mothers were more likely ________________________(把孩子的成功归因于) natural talent.
[填空题]Medieval universities were more law schools rather than ______as we mistakenly believed.
[填空题]
Blasts from the Past
1 Volcanoes were more destructive in ancient history. Not because they were bigger, but because the carbon 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 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.
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 ruptions 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, i
