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【单选题】
已知某材料的弹性模量E=200GPa，泊松比 ，则其切变模量为（ ）。A.
154MPa
B.
77 MPa
C.
143 MPa
D.
71 MPa
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举一反三
【多选题】实施宪法,需做到
A.
经常修改宪法
B.
崇尚与尊重宪法
C.
以宪法为行为的根本准则。自觉维护宪法
D.
根据宪法规定的原则和精神制定各方面的法律、法规，做到有法可依
【单选题】Just after stopping the engine while the oil is still circulating.Check that uniform oil jets appear from all the oil outlet grooves in the crosshead bearing lower shell and the guide shoes.The oil fl...
A.
the piston cooling oil return pipes
B.
the main and crankpin bearings
C.
thrust and intermediate bearings
D.
stern tube and thrust bearings
【简答题】Text B Understanding the text: I.Directions: After reading the passage, you will find 5 questions. For each question, please choose the best answer from the four statements provided. 1. How often shou...
【简答题】翻译 These working parts of an engine can easily cause the problems because they are working in high pressure, high temperature and changeable conditions. If something unusual happens, check the engine ...
【简答题】Place your car at the (1) . Stop the engine. Wait for a while to let the engine oil (2) to the oil pan. Pull the engine oil dipstick. Wipe it off with a clean rag or tissue. Then put it back all the w...
【简答题】Check the engine oil after every f u . (充满,填满)
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