问题:
[单选题]
A(1)l=22.6R,(2)σ/ρ=R(263w2R−g0)
B(1)l=36R,(2)σ/ρ=R(263w2R−g0)
C(1)l=22.6R,(2)σ/ρ=R(263w2R−g0/7.34)
D(1)l=36R,(2)σ/ρ=R(263w2R−g0)
A(1)l=22.6R,(2)σ/ρ=R(263w2R−g0)
B(1)l=36R,(2)σ/ρ=R(263w2R−g0)
C(1)l=22.6R,(2)σ/ρ=R(263w2R−g0/7.34)
D(1)l=36R,(2)σ/ρ=R(263w2R−g0)
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