标题: 继续请教PREP题（2）---目标很宏伟，要51！ [打印本页] 作者: slfxiaobai 时间: 2012-5-17 00:44 标题: 继续请教PREP题（2）---目标很宏伟，要51！ If 500 is the multiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y, which multiple of 100 is closest to x+y？ 1）x 小于500 2）y小于400 Key:E