钢筋混凝土材料的强度是充分发挥钢筋和混凝土这两种不同强度特性材料的联合作用。它们在钢 发布时间:2017-07-10 18:20 │ 来源:www.tikuol.com 题型:判断题 问题: 钢筋混凝土材料的强度是充分发挥钢筋和混凝土这两种不同强度特性材料的联合作用。它们在钢筋混凝土中各有其合适的位置:钢筋主要在受拉区,混凝土主要在受压区工作。( )
题型:判断题 For a long time they walked without saying _____ word. Jim was the first to break _____ silence. [ ]A. the; a B. a; the C. a; 不填 D. the; 不填 查看答案
题型:判断题 The danger of a charged hose left unattended on deck with the nozzle open is().A.the hose could burstB.the nozzle end will whip about causing damage or injuryC.water damage to vessel's cargo or structureD.personnel might trip over the hose 查看答案