【单选题】_______ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
【单选题】在护患关系建立的过程中,护士在开始期的重点任务是
【单选题】设A是3×4矩阵,B是3×5矩阵,如果AC T B有意义,则C是( )矩阵.
【单选题】We are quite sure that we can ________ our present difficulties and finish the task according to schedule.
【简答题】设A是3×4矩阵,B是5×2矩阵,且乘积ACB有意义,则矩阵C T 的阶数为______。