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考了个美国hurricane的问题,有说,hurricane发生的概率还是什么的有3.2几,在几几年到几几年发生的一些情况
Between 1995 and 2005, an average of 4.1 major hurricanes (Category 3 or higher) were spawned over the Atlantic each year. But in the three decades before that, only 1.5 major hurricanes formed each year, according to National Oceanic and Atmospheric Administration records.
K和研究人员做了实验,对珊瑚的观测,(一堆风与观测的关系)还有对DXXX的观测(DXX有考题)
>>>Diadema setosum 刺冠海胆(魔鬼海胆)
如果确定是海胆,应该可以找到比较多信息
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