GK1E内燃机车常用制动的制动率为()。A、38% B、29% C、57.7% D、 发布时间:2017-07-12 23:45 │ 来源:www.tikuol.com 题型:单项选择题 问题: GK1E内燃机车常用制动的制动率为()。A、38%B、29%C、57.7%D、78.6%
题型:单项选择题 The last time we had great fun was ____ we were visiting the Water Park. [ ]A.where B. how C. when D. why 查看答案