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1.Emergency numbers in diff erent countries　　999 — UK　　 000 — Australia　　　　110 — Japan　　 111 — New Zealand　　112 — France, Germany,2.若AT89S51单片机的晶振频率为6MHZ，则其机器周期为（）μS.3.When Ulysses S. Grant and Robert E. Lee met in the parlor of a modest house at Appomattox Court House, Virginia, on April 9, 1864.MINIX是一种基于微内核架构的类UNIX计算机操作系统，由Andrew S. Tanenbaum发明。5.The speech sound segments that can distinguish or contrast words in sound and meaning are（）s. (A（）is the minimal or smallest dis6.Sorry, I mistake your office（）John’s.7.To my surprise, the stranger（）to be an old friend of my mother’s.