问题
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When the bearing becomes dry from lack of oil, the motor shaft may heat to ______ an extent ______ it welds itself to the bearing.
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The transmission system transmitting power from the engine to the propeller is composed of shafts, bearings, and_____ .
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In some modern large diesel engines, which of the following is used as the support for the main bearings?
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According to the passage, the extent of the disaster in an earthquake depends on the follo
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One of the responsibilities of the Coast Guard is to make sure that all ships ______ follo
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What is the best way to avoid meeting bears?A.To run as fast as you can.B.To stay in a car