What do we learn from the last paragraph?A.Scient
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What do we learn from the last paragraph?
A.Scientists are planning to install pipes in all crater lakes.
B.Scientists still do not know how to prevent gas explosions.
C.Explosion disasters could be avoided in the future.
D.Warning systems have been set up in the villages nearby.
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答案：D
最后一段提到“the scientists have installed early warning systems at both lakes”，看来灾难是可防可控的，因此选D。