drill machine / drɪl məˈʃin
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1.drill machine / drɪl məˈʃin
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2.Seed drill is a machine __________.
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3.Seed drill is a machine __________.
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4.When iron filings are wound on the drill, stop the machine in time and remove it ( ).
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5.dr(3)∫x√l lnx
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6.Welding machine / ˈwɛldɪŋ məˈʃin
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7.如果直线l,m与平面α、β、γ满足β∩γ=l,l∥α,m⊆α,m⊥γ,那么必有( )A、m∥β且l⊥mB、α∥β且α⊥γC、α⊥β且m∥γD、α⊥γ且l⊥m
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8.一质量为m,长为l的均质细杆可在水平桌面上绕杆的一端转动,杆与桌面间的摩擦系数为m,求摩擦力矩M.
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9.A.n=1,l=1,m=0B.n=2,l=0,m=±1C.n=3,l=3,m=±3D.n=4,l=3,m=±2
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10.For machine tool type CM6132, the letter M stands for grinder