设x∈R，若函数f（x）为单调递增函数，且对任意实数x，都有ff（x）﹣e^x=e+1（e是自然对数的底数），则f（ln2）的值等于（　　）

根据拼音写出相应的词语。

根据首字母提示，完成短文填空。

       Cannon has shown a great interest in collecting flags. At the young age of four, Cannon began studying flags, d____ them in his coloring books and putting them up on his walls. Throughout school, he studied flags and tried to find out all he could about them. After university, Cannon s____ to be a lawyer. Throughout law school, he continued to collect flags. His classmates, friends, and family started c____ him “the flagman.”

      Cannon now has more than 200 flags in his collection. He shows many of them in his downtown law office. Once he d____ country flags for an exhibition on the Olympics.

       In addition to collecting flags, Cannon also w____ about them. He has published three books about flags. He loves to h____ from friends who see his b____ in stores all over the world. A few years ago, Cannon's hobby r____ a new level. He entered a flag design contest and won. The country he lives in asked him to design its f____. Cannon explains his hobby this way, “Collecting flags is l____ collecting pieces of history.”

已知方程组$\left\{\begin{array}{c}ax-by=4\\ 2x+3y=4\end{array}\right.$与$\left\{\begin{array}{c}ax+by=2\\ 4x-3y=2\end{array}\right.$的解相同，那么a+b=____