问答题

Dr. Press said that humans have set up ______ systems for plate tectonics disasters to limit their downside effects.

【参考答案】

predicting and warning
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单项选择题
To Dr. Donald J. DePaolo, crustal recycling is essential for the habitable earth because ______.
A．it may uplift about 150,000 lives being lost
B．it causes the earthquake and the tsunami
C．it gives birth to life from the very beginning
D．it doesn’t occur on other planetary body
问答题
Most geologists believe that the earth’s primordial ocean was made of ______ from volcanic eruptions.
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