【单选题】机车紧急制动后制动缸上升到最高压力时间应在()以内。
【单选题】SS4B型机车紧急制动性能试验时,制动缸最高压力应限制在( )kPa,且分配阀安全阀动作。
【多选题】制动机试验时,大闸由运转位打向紧急位时,有何现象?( )
【多选题】关于JZ-7型制动机自动制动性能的描述正确的是()。
A.
紧急制动后,制动缸最高压力420~450Kpa
B.
紧急制动后,制动缸上升到最高压力时间小于7秒
D.
常用全制动位制动缸压力330~3603Kpa
【单选题】The police caught tile man ______ into a house, videoed the whole process and arrested him ______.
【单选题】For the writer, the biggest obstacle during the whole process of attending college was ______.
B.
resistance from people at work
C.
to pass the American College Test
D.
culture shock experienced in college
【简答题】The whole process required a great deal of effort, skill and a luck.英译汉
【单选题】某一定量理想气体状态变化时,其内能随温度的变化关系如图中的 OA 直线 所示,则气体的状态变化过程一定是( )
【多选题】安静时,在室温条件下( )皮肤的温度最高,( )最低。
【单选题】The teacher gives guidance to the students through the. whole writing process, and then abolishes the guidance gradually until the students are good at writing. Hare the teacheruses _________ approach...