[单选题]_____________[A] assist[B] track[C] sustain[D] dismiss
[单选题][A] tolerate[B] sustain[C] experience[D] undertake
[单选题]They had no mapsto [assist] them.A.insistB.helpC.assignD.resist
[名词解释] 持续清洁生产(Sustain Cleaner Production)
[单选题]()we would like to assist you,we do not think there is room for a reduction in our price.A . EvenB . AsC . MuchD . Muchas
[名词解释] 站线 station track
[名词解释] 调车线 shunting track
[名词解释] 梯线 ladder track
[名词解释] 溜放线 rolling track
[名词解释] 码头线 wharf track