皮皮学，免费搜题
登录
搜题
【简答题】
缓冲装置的作用是缓和列车在运行中牵引力变化或制动及调车作业时，车辆之间相互碰撞而引起的冲击和振动，吸收能量以缓和车辆之间的冲击力，减少车辆之间的 。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
whether the experimented treatments should be compared against local standards
B.
whether the experimented treatments are shown to be effective
C.
when local communities will be able to carry out their own research projects
D.
the prohibitive costs involved
【简答题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You s...
【简答题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You s...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
