A Policeman and a Thief  
One day a policeman was taking a thief to the city . On the way , they saw a shop . The thief said . “ Let me go into the shop to buy some bread . We can eat it in the train . ”
The policeman agreed . The thief went into the shop and ran out of the back door . When the policeman knew that , he began to look for the thief everywhere . At last the policeman caught(抓获) thief again . They went on to the city . On the way they came to the same shop . The thief wanted to buy some bread again . “Oh , no . ” said the policeman , “You did that before , and you ran away . This time I^’ll go into the shop and buy bread . You must wait here for me . ”

“促进可持续的生活方式”，“践行绿色生活”．下列措施不符合建设“生态漳州”的是（  ）

萝卜、桔子等蔬菜水果放久了会空心，口感也会越来越差．这是因为在存放期间这些蔬菜水果仍然要进行____．从而消耗掉了部分有机物造成的．

计算 $\left(\frac{2x}{x^2-1}+\frac{x-1}{x+1}\right)$$÷$$\frac{1}{x^2-1}$的结果是（　　）

为加强防汛工作，某市对一拦水坝进行加固，如图，加固前拦水坝的横断面是梯形ABCD．已知迎水坡面AB=12米，背水坡面CD=12 $\sqrt{3}$ 米，∠B=60°，加固后拦水坝的横断面为梯形ABED，tanE= $\frac{3}{13}\sqrt{3}$ ，则CE的长为____米．