我的数学没话了~~哎 给大家会一些J吧 AI:题库99:A nation must maintain a highly competitive educational system-a system that students compete among themselves and against students from other countries-to ensure its own economic success. AA: 题库39:on average, 9 out of 1000 passengers who travelead on Avia airlines last year filed a complaint about our baggage-handling procedures. This means that although 1 percent of our passengers were unhappy with those procedures, the overwhelming majority were quite satisfied with them. thus it would appear that a review of the procedures is not improtant to our goal of maintaining the number of Avia airline's passengers.
Responding to the public’s fascination with-and sometimesundue alarm over-possible threats from asteroids, a scaledeveloped by astronomers rates the likelihood that a particular asteroid or comet may collide with Earth.
A.a scale developed by astronomers rates the likelihoodthat a particular asteroid or comet may
B.a scale that astronomers have developed rates howlikely it is for a particular asteroid or comet to
C.astronomers have developed a scale to rate how likelya particular asteroid or comet will be to
D.astronomers have developed a scale for rating thelikelihood that a particular asteroid or comet will
E.astronomers have developed a scale that rates thelikelihood of a particular asteroid or comet that may