正确答案: D

gudgeon pin

题目：In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the

解析：D

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举一反三的答案和解析：

[单选题]骨折的并发症，哪项应优先处理？

休克

[单选题]某人测得血压为158/90mmHg，请问他的血压属于下列哪种情况？

临界高血压