【简答题】反对称矩阵的主对角线上的元素均为_____.
【单选题】—Do you like western food, Li Lei? —No. The food of our country is ______ that of western food. [ ]
D.
much more delicious than
【单选题】—I prefer western food. It's a kind of healthy food. —________ But western food is said to be high in sugar and fat, such as hamburgers and fries.
C.
Do you really think so?