【单选题】轴肩和轴环能对轴上零件起准确轴向定位作用。 ( )
【多选题】20世纪60年代中期,美国IBM公司管理专家约瑟夫奥列基博士提出把企业内的各种物料分为( )和( )。
【单选题】阀门型号J41T-16表示的阀门类型是()。
【判断题】轴肩和轴环能对轴上零件起准确轴向定位作用。
【判断题】轴肩和轴环能对轴上零件起准确轴向定位作用
【多选题】Biosecurity prevention measures in the field of synthetic biology include:
A.
the establishment of decision-making authorities
B.
the development of norms and regulations to promote security
C.
engaging the public to make them understand the risks of synthetic biology
D.
the development of funding policies to promote security
【单选题】下列哪项措施不能提高船舶舵效:1提高船速;2提高船速的同时降低螺旋桨转速;3降低船速的同时降低螺旋桨转速;4降低船速的同时提高螺旋桨转速。
【简答题】【双语播报】 >Biosecurity top legal priority 我国将出台生物安全法 China will speed up its legislative process for a biosecurity law to secure national biosecurity, Wu Qian, a spokesperson at the Ministry of National ...