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【单选题】
( )为可伸缩的套节式踏级板,两侧设有扶手栏杆,中间铝合金踏板上涂有防滑漆,故乘客在上面行走时不会滑跌。
A.
司机室车门
B.
司机室通道门
C.
客室车门
D.
紧急疏散门
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, ho...
A.
How to render automobiles pollution-free.
B.
How to make smaller and safer automobiles.
C.
How to solve the problem of traffic jams.
D.
How to develop an automated subway system.