题目

The students found         easy to work out this maths problem.           A. it              B. this            C. that            D. him 答案：A如图所示，A、B在一水池的两侧，若BE=DE，∠B=∠D=90°，CD=8 m，则水池宽AB = （      ）m。 A.8B.9C.12D.14