题目

阅读理解 With smart technology increasingly influencing all aspectsof our lives, it is only a matter of time before someone invents “smart”shoes—ones that can be made based on personal needs. Called “ShiftWear”, thesneakers are the brainchild of a team of businessmen, and engineers led by NewYork-based designer David Coel. The adaptable shoes can be customized by using a smart phoneapp. Shoe owners will have the option of selecting a design from a variety ofHD pattern by famous artists or creating one themselves. The company's foundersimagine a marketplace where artists can not o⊙O的半径为5cm，弦AB∥CD，AB=6cm，CD=8cm，则AB和CD的距离是（ ）A．7cmB．8cmC．7cm或1cmD．1cm