价差预备费是为解决工程项目建设过程中，因()而增加的投资。
A. 人工工资价格上涨
B. 材料价格上涨
C. 设备价格上涨
D. 费用标准调整
E. 经上级批准的设计变更
在编制水利工程概算时，工程总投资应包括（ ）。
A. 工程部分投资
B. 建设征地移民补偿投资
C. 环境保护工程投资
D. 水土保持工程投资
基本预备费与价差预备费的计算基数均为静态总投资。（）
A. 对
B. 错
What did the old woman look like when the speaker saw her?
A. She was in neat clothes and walked elegantly.
B. She was in shabby clothes and walked with difficulty.
C. Her clothes were too thick and heavy and she could hardly walk.
D. She was fashionably dressed and walked with her head held high.
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