题目

Everyone wants to buy the perfect gift．Here are some very special gifts you might think about if you have a lot of money．   A beautiful sailboat The Skimmer bySail craft Inc flies across the water．The yellow sails on this bright red boat look really exciting．And the family of the lucky person whogets the Skimmer will be lucky，too．Theboat has its room for making meals and it can sleep four people．Only $178.000． A very special computer The Nell 1500 isthe newest in Nell’s line of unusual computers．It’s the smallest computer in the world．It’s just 5 cm by 6 cm It wil把直线y=2x+1向下平移4个单位得到直线y=2x-3y=2x-3．