【多选题】下列说法正确的是( ).
C.
实对称矩阵每个特征值的几何重数等于其代数重数.
【多选题】下列说法正确的是( ).
A.
实对称矩阵的属于不同特征值的特征向量是正交的.
D.
实对称矩阵每个特征值的几何重数等于其代数重数.
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【判断题】对身高在62厘米及以上的儿童,BMI指数大于22为肥胖,在15~19之间为正常。
【简答题】任务型阅读(每空一词,每空一分) It is interesting to know what people of different nations like to be best. In France, when a woman enters a café or restaurant, she is freely discussed, not only about her appearance...