求大牛解惑 黄皮书一道逻辑题

fatbearxq

[size=12.800000190734863px]Many geologists theorize that the trail of volcanic craters and cinder cones along the Snake River plain of southern Idaho was produced as the North American continent slid westward over a stationary “plume”, a vertical channel through which molten rock rose intermittently from the Earth’s core to burst through its curst.

[size=12.800000190734863px]Which of the following, if true, tends to support the geologists’ theory of how the trail was produced?

[size=12.800000190734863px](A) The largest craters and cinder cones are on the eastern margin of the trail.
[size=12.800000190734863px](B) The most violent volcanic activity apparently occurred at the western margin of the trail.
[size=12.800000190734863px](C) The craters and cinder cones are evenly spaced throughout the extent of the trail.
[size=12.800000190734863px](D) The newest craters and cinder cones are on the eastern margin of the trail.
[size=12.800000190734863px](E) The craters and cinder cones on the western margin of the trail generally took longer to form than did those on the eastern margin.

答案是 D

为神马？求大牛解惑！

晨沫沫

楼主，我今天刚刚做到这道题，题干里讲trail向西移动，所以最新形成的火山当然就在trail的东边了，选D木有问题