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。
If you make different trade in different countries, you must take different transport modes? () Yes 。 Not 。 It must be based on cost 。 Not mention in the paragraph。
What are the major goods moved in pipeline transport? () Natural gas 。 Crude oil 。 water 。 A, B and C。
监理工程师对混凝土配合比进行审查时,应重点审查()。 A、水灰比。 B、坍落度。 C、水泥品种。 D、水泥合格证明。
Cost of pipeline is very different of underground conditions. Is it right? ()