牵引车起动时起动机连续起动时间不得超过() A.15s B.20s C.25s D. 发布时间:2020-02-02 16:01 │ 来源:www.tikuol.com 题型:单项选择题 问题: 牵引车起动时起动机连续起动时间不得超过()A.15sB.20sC.25sD.30s
题型:单项选择题 Some teenagers turn a deaf ear to their parents’ advice, ________ they know it does good to them.A.now thatB.as ifC.even ifD.so that 查看答案