- UID
- 660224
- 在线时间
- 小时
- 注册时间
- 2011-8-10
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
一 A train travels from New York City to Chicago, a distance of approximately 840 mils, at an average rate of 60 miles per hour and arrives in Chicago at 6:00 in the evening, Chicago time. At what hour in the morning, New York City time, did the train depart for Chicago? note: Chicago time is one hour earlier than New York City time.) A 4:00 B 5:00 C 6:00 D 7:00 E 8:00 答案是B,我的答案是X+14+1=6+12 ,X=3
二 For integers a and b if √(a^3-a^2-b)=7,what is the value of a? a^2-a=12 b^2-b=2 A STATEMENT 〖1〗 is sufficient, but STATEMENT〖2〗is not sufficient B STATEMENT 〖2〗 is sufficient, but STATEMENT〖1〗is not sufficient C BOTH STATEMENT TOGETHER ARE sufficient, but neither alone is sufficient D EACH STATEMENT alone is sufficient E STATEMENT〖1〗AND 〖2〗TOGETHER are not sufficient 求解? 三 觉得逻辑BF题目好难,有时候比假设题还难,正确率不高,有什么技巧? |
|