△ABC是直角三角形,阴影Ⅰ的面积比阴影Ⅱ的面积小25平方厘米。AB长度为8厘米,则BC的长度约是( )厘米。(π=3.14)
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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