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A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a ().
关于晶状体核硬度分级错误的是()..
简述外国早期的行政组织思想有哪些?..
界定概念就是给概念下定义,下定义一般包括()。..
按进泥方向和出泥方向,离心脱水机分为()..
某男性溃疡病人经常胃出血,经医院检验Hb90g/L,RBC3.8&time..
如图7-34所示电路中,换路前处于稳态,换路后i(0)等于()A。..