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2. Last year the price per share of Stock X increased by k percent and the earnings per share of Stock X increased by m percent, where k is greater than m.By what percent did the ratio of price per share to earnings per share increase, in terms of k and m?
A.k/m % B.(k-m) % C.[100(k-m)]/(100+k) % D.[100(k-m)]/(100+m) % E.[100(k-m)]/(100+k+m) % 答案是D
3. In the triangle above, is x > 90? (1)a2 + b2 < 15 (2)c > 4这样看是两边之和小于第三边应该选E呀 可答案是C 为什么呢 求解
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