A.20~30 B.40~50 C.60~70 D.70~80
A.轉(zhuǎn)速,正比 B.轉(zhuǎn)速平方,正比 C.轉(zhuǎn)速立方,正比 D.轉(zhuǎn)速,反比
A.1/100,1/1000 B.1/1000,1.511000 C.1.5/1000,2.0/1000 D.2.0/1000,1/100