以下是引用mbz在2006/6/15 12:00:00的发言:D is not right because the number of days was fewer with moderate rainfall in 1990. Even if the number of days was only one day less, with the range of 1 - 2 inches, it is impossible for the total number of inches of rain that fell on days with moderate rainfall in 1990 to be more than twice what it had been in 1910. Hence, D is impossible. You can pick any number of days and do the calculation youself. 正解! ETS真TM阴险! |