连哈佛生都会踩进往的圈套4:多余信息 Billy sells twice as many $20 tickets as Tim, and Tim sells three times as many $10 tickets as Billy. How many tickets did Billy sell? Tickets are either $10 or ... /
2010-06-08 / 查看
7 次
OG10语法268题及GWD22语法总结日志十五 14. Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial s... /
2010-06-08 / 查看
2 次