根据《中华人民共和国船舶及其有关作业活动污染海洋环境防治管理规定》，船舶和燃油供给单位应当将燃油供受单证保存（）年，将燃油样品妥善保存1年。 3。 2。 1。 5。
(1) is a method of constructing a project schedule network diagram that uses boxes or rectangles, referred to as nodes, to represent activities and connects them with arrows that show the dependencies.This method includes following types of dependencies or precedence relationships: (2) the initiation of the successor activity, depends upon the completion ofthe predecessor activity.(3) the initiation ofthe successor activity, depends upon the initiation ofthe predecessor activity.空白（2）处填（） A.F-S。 F-F。 S-F。 S-S。
(1) is a method of constructing a project schedule network diagram that uses boxes or rectangles, referred to as nodes, to represent activities and connects them with arrows that show the dependencies.This method includes following types of dependencies or precedence relationships: (2) the initiation of the successor activity, depends upon the completion ofthe predecessor activity.(3) the initiation ofthe successor activity, depends upon the initiation ofthe predecessor activity.空白（1）处填（） A.PDM。 CPM。 PERT。 AOA。
The connection between two networks from an intemet is handled by a machine known as a（） bridge。 server。 router。 switch。
The parties to government procurement refer to the principal entities of all kinds that enjoy rights and undertake obligations in government procurement, including the procuring entities, the （）and the procuring agencies. users。 servers。 producers。 suppliers。
An example of scope verification is （）.
