EI提供的检索方法有（）
A、简易检索
B、快速检索
C、高级检索
D、叙词检索
E、索引浏览检索
参考答案：A, B, C, D, E
保留两位小数．
0.72×1.45≈
0.36×7.3≈
—What does your new teacher look like?
—_______. [ ]
A. He's very happy
B. He's at home
C. He's shy
D. He's heavy
