题目

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。In March, New York City Mayor Bill deBlasio ended a decade-long citywide ban on cellphone in public schools and leftthem to make up their own rules because he argued that by denying access for somestudents, the city was exacerbating(使加重) the achievement gap in students'performance.Two researchers from the London Schoolof Economics, Richard Murphy and Louis Philippe Beland argued that this mighthave the opposite effect because students are not generally using their phonesto assist in their cla2001年7月13日，北京申办2008年奥运会成功，可是距此一百年前，西方列强却给中华民族送来了一份令人不堪忍受的新世纪“贺礼”，那就是A．《南京条约》B．《北京条约》C．《马关条约》D．《辛丑条约》