A． assist B track C sustain D dismiss

[单选题]_____________[A] assist[B] track[C] sustain[D] dismiss

[单选题][A] tolerate[B] sustain[C] experience[D] undertake

()-|||-A dismiss-|||-B withdraw-|||-C return-|||-D recall

大学英语,选词填空contemplate maintenance dismiss indefinite compression draft mount swel

[名词解释] 持续清洁生产（Sustain Cleaner Production）

[单选题]They had no mapsto [assist] them.A.insistB.helpC.assignD.resist

= a,b,c,d . 由表-|||-a b c d-|||-a a b c d-|||-·b b d a c-|||-c c a b d-|||-d d c

[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