问题:
[单选题]
5-4-4 图示三铰刚架,设各杆EI为常数,E点的水平位移为____(以向右为正)
A(891q)/(EI)
B(486q)/(EI)
C(243q)/(EI)
D(81q)/(EI)
5-4-4 图示三铰刚架,设各杆EI为常数,E点的水平位移为____(以向右为正)
A(891q)/(EI)
B(486q)/(EI)
C(243q)/(EI)
D(81q)/(EI)
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