杆端的转动刚度s表示了杆端抵抗转动变形的能力，它与杆件的（）和（）有关；而与杆件的（）无关。
参考答案：线刚度i、远端支承情况、近端约束
---Can you see some people are waiting _______ the library?
---Yes, They are standing in a queue in front of its gate.
A. around B. inside C. outside
从减少风机叶轮粘灰振动的角度谈谈如何延长风机清灰周期？
