【简答题】1英寸=25.4mm,1atm=()米水柱。
【简答题】()泰勒标准筛从没英寸(25.4mm)筛网长度上的孔数即目。
【简答题】If the diameter of the new suce is 50mm, the diameter of the finished suce is 46mm, what is the depth of cut for turning?
【判断题】( )英制齿轮的模数是25.4 mm除以径节P。
【单选题】If the elongation of wire BC is 0.3 mm after the force P is applied, the magnitude of P is ( ). The wire is A-36 steel and has a diameter of 3 mm.【图片】
【单选题】An aluminum bar(E = 72 GPa, 【图片】) of diameter 50 mm cannot exceed a diameter of 50.1 mm when compressed by axial force P. The maximum acceptable compressive load P is approximately:
【单选题】我国禁止进境的与动物防疫相关之物是( )
C.
祖代种鸡 D 、奶牛精液 E、正流行牛海绵状脑病国家的奶牛