钻孔结构
参考答案：
构成钻孔剖面的技术要素。包括钻孔总深度、各孔段直径和深度、套管或井管的直径、长度、下放深度和灌浆部位等。
Which one of the following statements is FALSE（）
A. The cost recovery method is similar to the installment sales method in that revenue is recognized when cash is received, but no profit is recognized until all the cost of goods sold has been recovered.
B. The installment sales method recognizes revenue and the associated cost of goods sold only when cash is received. The profit recognized is the collected cash less the proportionate cost of goods sold.
C. The completed contract method doesn’t recognize revenue and expense until the contact is completed and title is transferred. Profits are recognized on a prorate basis.
个人承担风险的意愿是取决于（）。
A、决策树模型
B、蒙特卡罗方法
C、敏感分析
D、效用功能
