“一母生九子,连母十个样”这句话说明生物具有( ) A.新陈代谢的基本特征 B. 发布时间:2017-04-21 03:12 │ 来源:www.tikuol.com 题型:选择题 问题: “一母生九子,连母十个样”这句话说明生物具有( )A.新陈代谢的基本特征B.由小长大的基本特征C.遗传的基本特征D.变异的基本特征
题型:选择题 A painter has painted one-third of a rectangular wall which is ten feet high. When she has painted another 75 square feet of wall, she will be three-quarters finished with the job. What is the length (the horizontal dimension) of the wallA.18 feetB.12 feetC.10 feetD.9 feetE.(E) 6 feet 查看答案
题型:选择题 需设计一轻级工作制吊车厂房的钢结构屋盖,屋架跨度18m,屋架间距6m,车间长 36m,屋面材料采用太空轻质大型屋面板。其结构构件的平面布置、屋架杆件的几何尺寸,作用在屋架节点上的荷载以及屋架的部分杆件内力设置均示于下图中。该屋盖结构的钢材为Q235-B,焊条为E43型,屋架的节点板厚为8mm。如题表所示荷载作用下,屋架斜腹杆S2的轴心拉力设计值N(kN)应与()项数值相近。A.123.9B.135.3C.152.0D.180.2 查看答案