对于光整，拉矫操作，光整辊吊装前，必须确认光整辊两端的支撑铁块，必须放正。
参考答案：对
_____ that Mary was able to set up new branches elsewhere. [ ]
A. So successful her business was
B. So successful was her business
C. So her business was successful
D. So was her successful business
异山梨酯(消心痛)治疗心绞痛的作用原理是
A．减慢心率，降低心肌收缩力B．扩张静脉及周围血管C．抑制血小板聚集D．改善心肌营养与代谢E．扩张冠脉及外周血管，减轻心脏负担
