单项选择题
A、Ⅰ、ⅢB、Ⅱ、ⅢC、Ⅱ、ⅣD、Ⅰ、Ⅳ
A.They are simple and they operate mechanically.B.They can solve all kinds of difficult problems.C.Computers are so advanced that they will control human being someday in the future.D.They are not as complicated as human brain.