作者frostyfox (冰冷的双眼...)
看板GRE_Verbal
标题Re: 请教GRE数学问题
时间Mon May 28 09:19:55 2007
: 问题三:
: The total surface area of cube Ｃ equals 150.
: Column A column B
: the length of one edge of cube C 4.5
: Answer: A
cube=正方体
所以 6x^2=150 => x=5
: 问题四:
: On a trip, Marie drove 200 miles in 5 hours using gasoline that
: cost her $1.49 per gallon.
: Column A Column B
: Marie's average speed for the Marie's gas mileage for the
: trip in miles per hour trip in miles per gallon
: Answer:D
A=200/5=40
B=200/耗费掉的总油量
所以不能算，因为不知道他到底花掉多少油
: 感谢大家的回答啊！
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