题目

阅读理解 As for old people, some of theapplications are hard to use because they didn't grow up with them. They don'thave simple models of how they should work, what to do when something doesn'twork or where to go for help. We make it as easy as possible to be used forpeople who are not familiar with the technology. I think there is huge potential (潜力) and we are designing it. The abilityto connect to friends, who remember the same movies and news and music, isreally important, especially as people get old. They end up in retirement homesand they aren't always close to their friends. A若关于x的一元一次方程=1的解为x=-1，则k的值为（ ）A．B．1C．-D．0