A major earthquake measuring 7. 8 on the Richter scale jolted Wenchuan County in southwest China’s Sichuan Province on Monday, t

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问题 A major earthquake measuring 7. 8 on the Richter scale jolted Wenchuan County in southwest China’s Sichuan Province on Monday, the State Seismological Bureau(SSB)said.

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答案里克特震级(测量地震强度的标准)

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