A.污染環(huán)境B.使排氣凈化裝置失效C.增加發(fā)動(dòng)機(jī)磨損D.易使發(fā)動(dòng)機(jī)發(fā)生爆燃
A.101B.102C.103D.104
A.凸輪軸離曲軸近B.凸輪軸離曲軸遠(yuǎn)C.零件少D.剛度強(qiáng)