Whatd idscientistslearnaboutearthquakesattheRockyMountainArsenal?
A)Theyoccuratabout4,000metr esbelowgroundlevel.
B)Theinjectionofwaterintoearthquakefaultspreventsearthquakesfromoccurring.
C)Theyareusuallycausedbytheoilinthefaults.
D)Harmfulearthquakesearlbepossiblypreventedbycausingsmall,harmlessearthquakes.
正确答案：D答案：D
[试题分析]细节题。
[详细解答]最后一句话…scientistscouldinjectsomekindoffluidlikewaterintofaultsandchangeonebigearthquakeintoanumberofsmall，harmlessearthquakes．告诉了我们答案，显然，D正确。
