题目

 Almost everyone has his own strengths and weaknesses. It is            others are weak that maybe you have a great advantage.        A. as          B. where       C. that      D. what 答案：B已知p:方程x2+mx+1=0有两个不等的负根；q:方程4x2+4（m-2）x+1=0无实根.若p或q为真,p且q为假,求m的取值范围.