問題詳情

Part III: Reading Comprehension    In July of 1994, an astounding series of events took place. The world anxiously watched as, every fewhours, a hurtling chunk of comet plunged into the atmosphere of Jupiter. All of the twenty-odd fragments,collectively called comet Shoemaker-Levy-9 after its discoverer, were once part of the same object, nowdismembered and strung out along the same orbit. The cometary train, glistering like a string of pearls, hadbeen first glimpsed only a few months before its fateful impact with Jupiter, and rather quickly scientists hadpredicted that the fragments were on a collision course with the giant Jupiter. The impact caused an explosionclearly visible from Earth, a bright flaming fire that quickly expanded as each icy mass incinerated itself.When each fragment slammed at 60 kilometers per second into the dense atmosphere, its immense kineticenergy was transformed into heat, producing a superheated fireball that was ejected back through the tunnelthe fragments had made a few seconds earlier. The residue from these explosions left huge black marks onthe face of the Jupiter, some of which have stretched out to form dark ribbons.    Although this impact event was of considerable scientific impact, it especially piqued curiosity andinterest. Photographs of each collision made the evening television newscast and were posted on the Internet.This is probably the most open scientific endeavor in history. The fact of the largest planet in the solar systemwas changed before our very eyes. And for the very first time, most of humanity came to fully appreciate thefact that we ourselves live on a similar target, a world subject to catastrophes by random assaults fromcelestial bodies. One of the great truths revealed by the few decades of planetary exploration is that collisionsbetween bodies of all sizes are relatively commonplace, at least in geologic terms, and were even morefrequent in the early solar system.
71. The passage mentioned which of the following with respect to the fragments of comet Shoemaker-Levy-9?
(A) They were once combined in a large body.
(B) Some of them burned up before entering the atmosphere of Jupiter.
(C) Some of them are still orbiting Jupiter.
(D) They have an unusual orbit.

參考答案

答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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