讨论区找不到,所以请教一下! 1. Over a certain period, did the number of the shares of stock in A's profolio increase? i The ratio of the number of the shares of stock to the total number of the shares and bonds increase ii. The Total number of the shares and bonds increase. 答案是E,我选A,因为我想(shares)/(shares+bonds)的比率上升,不就意味着SHARES上升吗? 2. n, p integer. p>0? i. n+1>0 ii. np>0 答案是C,我选E,因为n>-1, n有可能是"-" or "+", 另外np>0 意味着n,p 为正正或负负, 若是如此,不就是E吗? 请帮忙! |