沥青砼面层横向裂缝产生的原因可能是() A、施工缝未处理好。 B、半刚性基层收缩裂缝反射。 C、温度应力作用。 D、雨水侵蚀。
Where is the rail service better than U.S? () Canada 。 Europe 。 Japan 。 Nowhere。
钻孔灌注桩坍孔可能的原因() A、孔内水位高度不够。 B、泥浆比重过大。 C、钻至砂砾层。 D、钢筋笼碰撞孔壁。
Pipeline is able to deliver the products based on the advantages of low rate of loss and damage, minimal climatic effects and reduced labor cost. Do you agree? () Yes, I do. 。 No, I do think so. 。 I don’t find it here 。 I can’t find it here。
What are the major goods moved in pipeline transport? () Natural gas 。 Crude oil 。 water 。 A, B and C。
Pipeline is low cost and reliable. Is it true? ()