earthquakes-免費(fèi)閱讀
【正文】 third, make the houses as strong as possible. The outside of the earth is made of a ______ of different plates. At San Francisco, the Pacific plate and the North American plate often _____. Sometimes the two plates _____ moving. Sometimes they ____ and an earthquake is ___. So west Amer ica near the sea _____ always ____ a bad place for earthquakes. The number move stop jump felt has been biggest quake ________ in 1906. It ________ a great part of the city and _____ 700 people. Though earthquake cannot be_____, we can do things to make they don39。t destroy the whole city. We mustn39。 second, build houses on rock not on sand。t build houses _____ the lines ______ earth’s plates join together. We must build them on ____ not on ___ happened destroyed killed stopped along where rock sand San Francisco 1906250,000 people lost homesSan Francisco, 1989A road fell onto another road50 kilometers awayBuildings, not strong enoughPa c ifi c
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