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An earthquake is among the most frightening disasters precisely because it gives almost no warning. The ground simply begins to shake, often for less than a minute, yet that is long enough to bring down buildings and bridges and to trap people beneath the rubble. The cause lies deep below the surface, where the huge…
Ένας δωρεάν λογαριασμός ανοίγει τη δεύτερη εξέταση κάθε μέρους και κρατά τους βαθμούς σου.