冶金因素、力学因素、工艺因素等，影响着结晶裂纹的产生及扩展。
参考答案：对
编写监理实施细则的依据之一是 (44) 。
A．监理合同文件 B．监理大纲 C．项目审批文件 D．施工组织设计
Which of the following statements concerning aggregate demand is most accurate（）
A. When price levels rise, real wealth increases, and individuals will spend more.
B. When price levels rise, real wealth decreases, and individuals will spend less.
C. When price levels fall, real wealth increases, and individuals will spend less.
