地基反力分布如图所示,荷载N的偏心距e应为()。
A.e=B/10
B.e=B/8
C.e=B/6
D.e=B/4
参考答案:C
解析:
地基反力呈三角形分布时,偏心距为B/6。
根面平整的最终目的是()
A.去除根面残余牙石
B.平整牙根面
C.创造生物相容的环境
D.用化学处理根面
E.除去污染的牙骨质
He studied English in the morning, played the piano on Saturday afternoon and drew pictures on Sunday morning. He is _____ now.[ ]
A. hungry
B. stressed
C. thirsty
D. tired