单选题 3.2□△6
If □ and △ each represent single digits in the decimal above, what digit does □ represent?
(1)When the decimal is rounded to the nearest tenth, 3.2 is the result.
(2)When the decimal is rounded to the nearest hundredth, 3.24 is the result.

【正确答案】 E
【答案解析】[解析] 根据(1)只能得到□是一个比5小的数,所以(1)不充分;
因为根据(2)并不知道△是否大于5,所以也无法判断□究竟代表3,还是代表4,因而(2)也不充分。