题目

如图，在▱ABCD中，对角线AC与BD交于点O，若增加一个条件，使▱ABCD成为菱形，下列给出的条件不正确的是(         ) A．AB＝AD     B．AC⊥BD     C．AC＝BD     D．∠BAC＝∠DAC 答案：C短文改错 Tom was a clever boy . He was always trying out new 1．________ ideas . One day his father saw him sat on some eggs 2．________ when Tom was a five-years-old boy . His father asked 3．________ him why he was doing that . Instead of answer his 4．________ father, he said he wanted to have chicken. 5．________ Young Tom was at school since only three months . 6．________ During those three months he asked a lot of strange 7．________ questions . Much of them were not about his lessons. 8．________ So his teacher sent him out from school. But this 9．________ boy, we tell you, succeeded when he grows up. 10．________