题目

阅读理解Massive open online courses(MOOCs) are making waves nowadays,and although it's too soon to determine their final influence on the universitiesacross the country and the world, they are sparking off a lively debate among educatorsand students.The first MOOC arrived on thescene back in 2011 when two Stanford teachers offered their artificial intelligenceclass online for free. Enrollment topped 160,000, and the unexpected success ofthe experiment encouraged other schools.Supporters believe making qualityeducational instruction available to the public will provide higher quality andlow若分式x-1x的值为0，则其中x=11．