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【单选题】
心肌不发生收缩的主要原因是A.
有平台期
B.
动作电位时
C.
有效不
D.
终池不发达
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【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】Before starting the engine , it necessary to check the oil ( lever/level ) .
【单选题】Before starting the engine, it,s necessary to check the oil (lever /level)
A.
lever
B.
level
【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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