There         a bird in the tree.

已知关于x，y的二元一次方程组$\left\{\begin{array}{c}2x+3y=k\\ x+2y=-1\end{array}\right.$的解互为相反数，则k的值是 ____．

太平天国后期，提出向西方学习，改革内政，写成《资政新篇》的领导人是（    ）

 根据短文内容，用方框中所给单词的正确形式填空，使短文通顺，完整，每词限用一次。

  Nowadays, there are many robots working in factories. They can help to build cars, and____  doing simple jobs over and over again. Fewer people will do such jobs in the future because they are boring, but robots will never get ____ . Some robots in Japan can walk and dance. There will be a lot____ robots in future. Some scientists believe that we can make robots move like a human and also it will be possible to make____  really think and talk like a human.. However, it may take ____  of years. The robots in the future will have many different shapes, such as humans, plants, animals and so on. Do you think you will have your own robot in the future