Humans are forever forgetting that they can’t control nature. Exactly 20 years ago, a Time magazine cover story announced that “scientists are on the verge of being able to predict the time , place and even the size of earthquakes.” The people of quake-ravaged Kobe (神户)learned last week how wrong that assertion was.
None of the methods conceived two decades ago has yet to discover a uniform warning signal that preceded all quakes, let alone any sign that would tell whether the coming temblor (震动) is mild or a killer. Earthquake formation can be triggered by many factors, says Hiroo Kanamori, formation can be triggered by many factors, says Hiroo Kanamori, a seismologist (地震学家)at the California Institute of Technology, So, finding one all - purpose warning sign is impossible. One reason: Quakes start deep in the earth, so scientists can’t study them directly . If a quake precursor were found, it would still be impossible to warn humans in advance of
A. It is hard to build structures strong enough to withstand serious temblors
B. Not all structures can be made to withstand the tremor of the earthquakes.
C. The degree of damage caused by earthquakes to different buildings can hardly be predicted accurately.
Humans are forever forgetting that they can’t control nature. Exactly 20 years ago, a Time magazine cover story announced that “scientists are on the verge of being able to predict the time , place and even the size of earthquakes.” The people of quake-ravaged Kobe (神户)learned la st week how wrong that assertion was.
None of the methods conceived two decades ago has yet to discover a uniform warning signal that preceded all quakes, let alone any sign that would tell whether the coming temblor (震动) is mild or a killer. Earthquake formation can be triggered by many factors, says Hiroo Kanamori, formation can be triggered by many factors, says Hiroo Kanamori, a seismologist (地震学家)at the California Institute of Technology, So, finding one all - purpose warning sign is impossible. One reason: Quakes start deep in the earth, so scientists can’t study them directly . If a quake precursor were found, it would still be impossible to warn humans in advance o
A. A man that may come before the happening of an earthquake.
B. The leading factor that may cause a series of events to occur.
C. Any meaningful sign that indicates some would- be happenings.
D. An event that may have symbolic or significant nature.
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