题目

    Sports can help you keep fit and close to nature. However, whether you are on the mountains, in the waves, or on the grassland, you should realize that sport you choose might have great influence on the environment.     Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also lots of water. Besides, huge amounts of energy are used to keep its courses（球场）in good condition. This causes major environmental changes. For example, in the dry places of Portugal and Spain, golf is often held responsible for (为...承担责下列各论述中正确是有 （填序号）①y=sinx+1sinx的最小值为2；②函数f（x）=ex+4x-3的零点在区间（14，12）内；③函数y=sinx+cosx（x∈R）的最大值为2；④y=12cos2x+32sinxcosx图象的一条对称轴为x=π6．