题型:名词解释 Father _____ for London on business upon my arrival, so I didn't see him.A. has leftB. left C. was leaving D. had left 查看答案
题型:名词解释 如图11-41所示工字形截面梁,在y向外力作用下,其截面正应力和剪应力最大值发生在下列何点().A.1点正应力最大,2点剪应力最大B.1点正应力最大,3点剪应力最大C.4点正应力最大,2点剪应力最大D.4点正应力最大,3点剪应力最大 查看答案