Last year the price per share of Stock Xincreased by k percent and the earnings per share of Stock X
increased by m percent, where k is greater than m. Bywhat percent did the ratio of price per share to
earnings per share increase, in terms of k and m ?
答案：D
Of the 300 subjects who participated in an experiment using virtual-reality therapy to reduce their fear of heights, 40 percent experienced sweaty palms, 30 percent experienced vomiting, and 75 percent experienced dizziness. If all of the subjects experienced at least one of these effects and 35 percent of the subjects experienced exactly two of these effects, how many of the subjects experienced only one of these effects?
(A) 105
(B) 125
(C) 130
(D) 180
(E) 195
答案：D