正面接近时，救生员需下潜至溺水者的髋部以下。
参考答案：对
In relation to contracts of employment, discuss the main duties of an employer towards his employees under the Labour Code, 1992. (10 marks)
在施工现场预制的桩长度不超过30m，接头不宜超过（）
A.3个
B.2个
C.1个
D.没有限制
