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【判断题】
对于远期列车编组在 6-8节的轨道交通系统,站台长一般在130~1 8 0米 。A.
正确
B.
错误
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【简答题】D Health officials in the United States reported last week on what they believe could be a medical first. Officials said doctors performed what could be the first double lung transplant on a person wh...
【单选题】The crosshead and crankpin bearings are secured to the_____ by means of fitted bolt.
A.
crosshead guides
B.
piston rod
C.
crosshead shoes
D.
connecting rod
【单选题】The position of ______ on the crosshead is determined by dowel pins.
A.
grooves
B.
piston skirts
C.
position rings
D.
crosshead shoes
【单选题】The immediate cause of the crash of Colgan Air Flight 3407is __________.
A.
the captain was chitchatting with the first officer
B.
thc young first officer had little experience dealing with icyconditions
C.
both the captain and the first officer were quite tired after along-time journey
D.
the captain Marvin Renslows mistaken operation
【单选题】In a large slow-speed propulsion diesel engine, the force applied to the crosshead is ______.
A.
against the crosshead during power stroke and away from the crosshead during the compression stroke
B.
against the crosshead during the compression stroke and away from the crosshead during the compression stroke
C.
against the crosshead during the power and compression strokes
D.
away from the crosshead during the power and compression strokes
【简答题】阅读理解: Health officials in the United States reported last week on what they believe could be a medical first. Officials said doctors performed what could be the first double lung transplant on a perso...
【简答题】Change each group of two sentences into one. Use a comma (,) if necessary. The first one has been done for you. Model: Foreigners often have difficulty with English spelling. English spelling is not a...
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