问题
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One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and
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Section BDirections: In this section, you will hear 3 short passages. At the end of each p
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Section BDirections: In this section, you will hear 3 short passages. At the end of each p
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Section BDirections: In this section, you will hear 3 short passages. At the end of each p
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Section BDirections: In this section, you will hear 3 short passages. At the end of each p
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The lower section of a piston is called the ______.A.landB.skirtC.crownD.plate