当框架抗推刚度很小时，λ值较小；λ=0即纯剪力墙结构；当剪力墙抗弯刚度很小时，λ值增大；λ=∞时相当于纯框架结构。
参考答案：对
— Have you known Dr. Jackson for a long time?
— Yes, since she _____ the Chinese Society. [ ]
A. has joined
B. joins
C. had joined
D. joined
患者男，42岁，症见左下肢皮色紫黯，抬高时见苍白，足背毳毛脱落，皮肤肌肉萎缩，趾甲变厚，趺阳脉搏动消失，患肢疼痛持续，夜间为重，舌黯红，脉沉细而涩。
上例患者当选何方药（）
A.阳和汤、独活寄生汤
B.四妙勇安汤、顾步汤
C.十全大补汤、人参养荣汤
D.六味地黄丸
E.桃红四物汤
