列五幅图是世博会吉祥物照片,质地大小、背面图案都一样,把它们充分洗匀后翻放在桌面上,则抽到2010年上海世博会吉祥物照片的概率是( )
—Why are you looking for Mary in a hurry, John?
—The boss is wondering where she _____ and how long she ______ there.
使x-2有意义的x的取值范围是____ .