Now boys and girls, I have got something to t____ you. Tomorrow is Friday. We are going to have our O____ Day. Our parents will come to school and v____ our school. They will a____ at three t____. They will s____ in the classroom and listen to our teachers. Then they will go to the p____ to see our wonderful show.

一 What do you know about kite surfing?

一 It is          exciting water sport.

指数函数y=a^x,y=b^x,y=c^x,y=d^x在同一坐标系中的图象如图所示，则a,b,c,d与1的大小关系为 （    ）