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。
Pipeline is low cost and reliable. Is it true? （） Dependable 。 Not 。 Yes 。 Not mention here。
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。
The main disadvantage is（）in global logistics. unqualified products 。 Different languages。 Transportation delayed 。 Unreliable delivery of goods。
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? （）
