进行建设项目安全预评价依据的设计文件是项目（）
A.可行性研究报告
B.建议书
C.施工图设计
D.设计说明书
参考答案：A
— Any news about Bill Clinton?
— He left power three years ago and has a little now and a little then been _____. [ ]
A. heard of since
B. heard since
C. heard before
D. heard of before
PC流动性对（）依赖性最高。
A、压力
B、温度
C、剪切力
D、背压
