Over 60 percent of the cyclists who entered last month’s race, but only about 40 percent of those who entered this month’s race, finished in under one hour. Since the courses used for the two races are exactly the same lenth, the course used for this month’s race must be more difficult than the one used last month.
Which of the following most strengthens the argument?
A.There were not cyclists who entered one of the races who did not also enter the other race.
B.More cyclists entered this month’s race than entered last month’s race.作者: 猫猫头 时间: 2003-6-22 17:32
