A、(A)100mm
B、(B)20mm
C、(C)300mm
D、(D)400mm
答案:D
A、(A)100mm
B、(B)20mm
C、(C)300mm
D、(D)400mm
答案:D
A. (A)146°18′20″
B. (B)146°18′36″
C. (C)146°18′24″
D. (D)146°18′30″
A. (A)10d
B. (B)5d
C. (C)3d
D. (D)15d
A. (A)txt
B. (B)doc
C. (C)wps
D. (D)dos
A. (A)低碳钢
B. (B)高碳钢
C. (C)中碳钢
D. (D)低合金钢
A. (A)300mm
B. (B)280mm
C. (C)250mm
D. (D)200mm