当列车折角塞门被以外关闭时，司机可以直接操作列尾装置，使其强行排风，促使列车制动。
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企业的生产类型一般按年产量划分为（）、成批生产和（）。
A fire starting by spontaneous combustion can be expected in which condition?（）.
A. Paints，varnish，or other liquid flammables are stowed in a dry stores locker
B. Inert cargoes such as pig iron are loaded in a wet condition
C. Oily rags are stowed in a metal pail
D. Clean mattresses are stored in contact with an electric light bul
散的保温材料应使用无机材料，如选用有机材料时，要先作好材料的（）。
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