A.梁高的1倍
B.梁高的1.5倍
C.梁高的2倍
D.梁高的2.5倍
A.梁高的1倍
B.梁高的1.5倍
C.梁高的2倍
D.梁高的2.5倍
A.450mm
B.600mm
C.900mm
D.1200mm
A.梁端部
B.梁中部
C.梁底部
D.从梁端起的1/4跨度
A.40
B.44
C.48
D.88
A.450mm
B.600mm
C.1050mm
D.1400mm
A.50mm
B.75mm
C.90mm
D.100mm
A.一样
B.1.5倍
C.一半
D.两倍
A.1倍
B.1.5倍
C.2倍
D.2.5倍
A.450mm
B.600mm
C.1050mm
D.1400mm