车钩缓冲装置具有（）作用。 ["牵引","分离","连挂","缓冲"]
电子商务供应链管理有利于统一管理、减少流通环节、降低成本、提高效率。
制动甩尾的原因有（）。 ["制动阀调整不当","两后路制动间隙过小","量后轮制动气室制动管路漏气","前桥悬架弹簧弹力不一致"]
厂处级发表会时，（）需要对该活动成果进行点评 ["一级主管","二级主管","活动圈圈长","工作组组长"]
Dogs are often praised for their（）they almost never abandon their masters. ["faith","loyalty","trust","truthfulne"]
“伏尔加河的纤夫”曾经令世界美术界震撼。画面上，饱受繁重劳动折磨的纤夫个性鲜明，充满艺术的美感。此画的作家是谁？
