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举一反三
【多选题】洗车作业安全基本原则正确的有（ ）
A.
洗车作业前必须确认两端司机室侧门锁好
B.
列车在进入洗车线前，司机必须联系洗车机操作员，明确洗车方式
C.
严格按洗车线行车标志、洗车信号机的显示和调车信号的显示行车
D.
洗车过程中必须采用慢行模式运行，端洗时严禁操作雨刮器
【单选题】How to Use the Sense of Smell Our sense of smell, which we normally take for granted, is nowadays being increasingly used for purposes which might surprise us if we aware of them. One area in which sm...
A.
3) preferred ______.A. the smell of shoes to that of flowersB. the smell of flowers to that of shoesC. the shoes in the room with purified airD. the shoes in the room with appealing smells