当施工作业噪音可能超过施工现场的噪声限值时，应在开工前向（），（）申请，核准后才能开工。
参考答案：建设行政主管部门；环保部门
Henry had just given himself for lost ______ he was spotted by a ship.
A．when
B．while
C．as
D．after
简述人体双器官在足部反射区分布的对称性？
