1/(12×13)+1/(13×14)+…+1/(19×20) A.1/20 B. 发布时间:2018-07-06 02:29 │ 来源:www.tikuol.com 题型:单项选择题 问题: 1/(12×13)+1/(13×14)+…+1/(19×20) A.1/20 B.1/30 C.1/40 D.1/12
题型:单项选择题 The car was stopped by highway man, while ______ through a forest.A.was passingB.passedC.passingD.pass 查看答案