题目

On February 3,1931 the peace of New Zealand's Hawkes Bay region was destroyed when the area was hit by the worst earthquake in New Zealand's history.At 10:46 am on that summer's day,the quake hit with a magnitude of 7.9 on the Richter scale（里氏震级）.The centre of the quake lied some 15 to 20 kilometers north of the two main centers,Napier and Hastings.The quake lasted for two and a half minutes.Many people died in the earthquake. A fire broke out immediately after the quake.The fire started in a chemist's shop and spread quickly.Then the Fire Department in Napier came to help,but they人的正常血压范围相当于70cm－120cm水银柱产生的压强，那么人的正常血压范围是             kPa―         kPa。