i. reading comprehension
chelyabinsk, russia - a meteorite(piece of rock or metal that has reached the earth’s surface from out space) streaked across the sky and exploded over central russia on friday, raining fireballs over a vast area and causing a shock wave that smashed windows, damaged buildings and injured 1,200 people.
people heading to work in chelyabinsk heard what sounded like an explosion, saw a bright light and then felt the shock wave, according to a reuters correspondent in the industrial city 1,500 km (950 miles) east of moscow. the fireball, travelling at a speed of 30 km (19 miles) per second according to russian space agency roscosmos, had blazed across the horizon, leaving a long white trail that could be seen as far as 200 km (125 miles) away.
car alarms went off, thousands of windows shattered and mobile phone networks were disrupted (扰乱). the interior ministry said the meteorite explosion, a very rare spectacle, also unleashed a sonic boom (音爆).
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