A. 打牙关、松下巴 B. 挺软腭 C. 提颧肌 D. 力量集中
A. is given B. was given C. gives D. were give
A. 桥址附近风向 B. 桥址附近风速 C. 桥址附近有关地震资料 D. 施工单位及施工人员