价差预备费
参考答案：
指建设项目在建设期内（或概算编制期至竣工）由于政策、价格等因素变化引起工程造价变化的预测预留费用。
骨折的早期并发症包括（）。
A.休克
B.神经损伤
C.脂肪栓塞
D.创伤性关节炎
E.内脏损伤
Many towns and villages had their water supply ________ because there was no electricity.
A．cut through
B．cut off
C．cut up
D．cut down
