A.$90,000

　　B.$96,000

　　C.$108,000

　　D.$135,000

　　E.$180,000

　　答案：C

　　5.At 9:00 a.m. train T left the train station and two hours later train S left the same station on a parallel track. If train T averaged 60 kilometers per hour and train S averaged 75 kilometers per hour until S passed T, at what time did S pass T?

　　A.2:00p.m

　　B.5:00p.m

　　C.6:00p.m

　　D.7:00p.m

　　E.9:00p.m

　　答案：D

　　6.The charge for a telephone call made at 10:00 a.m. from City Y to City X is $0.50 for the first minute and $0.34 for each additional minute. At these rates, what is the difference between the total cost of three 5-minute calls and the cost of one 15-minute call?

　　A.$0.00

　　B. $0.16

　　C. $0.32

　　D. $0.48

　　E. $1.00

　　答案：C

　　7.A consumer insulates a house with material bought at 20 percent off the list price of $370.If the consumer also receives a rebate of $25 from the manufacturer of the material, how much does the material cost the consumer、

　　A. $238

　　B.$240

　　C.$263

　　D.$271

　　E.$325

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