相邻两牙螺纹在中经线上对应两点间的轴向距离称为
螺距
暂无解析
Hiswifehasbeen_______alotofpressureonhimtochangehisjob.
曲线y=x^33x^25x4的拐点坐标为（）
Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.
Theteamplayedhardbecausethechampionshipofthestatewas______.
________,Johnhasbeentoseveralforeigncountries.