题目

 Which of the following sentences is NOT right? A. There is no doubt that you will succeed.       B. We have no doubt that you will succeed. C. We don’t doubt that you will succeed.         D. We don’t doubt whether you will succeed.    答案：D如图，在菱形ABCD中，AB的垂直平分线EF交对角线AC于点F，垂足为点E，连接DF，若∠CDF=24°，则∠DAB的度数为_________．