混凝土灌注桩施工控制要点中，长螺旋钻成孔首先应对孔位进行定点，并设置测量基准线、水准基点，施工前已对桩位进行了预检（）
参考答案：对
股指期货交割结算价为最后交易日标的指数的______。
A．开盘价 B．收盘价C．最后2小时的算术平均价 D．最后1分钟的算术平均价
At no time _____ was happening. [ ]
A. the President was aware of what
B. was the President aware of what
C. the President was aware that
D. was the Ptesident aware that
