（）是指承托基础的场地。
A、地基；
B、条型基础；
C、桩基础；
D、承台。
参考答案：A
The U.S.A. made a lot of excuses in an attempt to make war on Iran. However, its ____ purpose lay in the plentiful oil there.
A. incredible B. fundamental C. flexible D. identical
继电保护快速切除故障对电力系统有哪些好处
