【单选题】He glanced out of the window,______ that the post office was still closed.
【单选题】焊接吊车梁的腹板局部稳定常采用配置加劲肋的方法来解决,当ho/tw>170235/fy时,()。
B.
可能发生弯曲失稳,应配置纵向加劲肋和横向加劲肋
D.
可能剪切失稳和弯曲失稳,应配置横向加劲肋和纵向加劲肋
【简答题】两点-半径是指给定圆上任意( )个不重合点的坐标及圆的半径生成整圆
【单选题】He heard someone following him,and glanced round.He ________ a dark figure in the shadows. [ ]
【单选题】肾上腺皮质激素结构区别于其他甾体激素类药物的显著标志是
【单选题】焊接梁的腹板局部稳定常采用配置加劲肋的方法来解决,当 >150 (受压翼缘扭转未受到约束)时( D )。 (A) (B) (C) 可 (D)
D.
可能发生剪切失稳和弯曲失稳,应配置横向和纵向加劲肋
【单选题】As John turned he glanced at the calendar hanging beside the phone, and suddenly realized what day it was. [ ]
【单选题】As I waited for my brother to arrive, I __________ the clock and saw that he was late. [ ]