【单选题】He put it firmly that in no case ____ give in to others on such matters. [ ]
【判断题】十进制数513转换成二进制数是1000000001.
【单选题】She asked me whether ______ able to read and write in English.
【简答题】我必须是你近旁的一株木棉, 。《致橡树》
【判断题】方程 个数和未知量个数相等的齐次线性方程组 只有 零解,则其系数行列式不等于零 .