In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n)（）.

If there is a strike or lock-out affecting the cargo on or after vessel’s arrival at port of discharge and the same has not been settled within 48 hours，Receivers shall have the option of keeping vessel waiting until such strike or lock-out is at an end against paying half demurrage after expiration of the time prescribed for discharging or ordering the vessel to a substituting port．The “same” refers to（）.

A star is observed at lower transit. The line of position derived from this sight is（）.

—Look at the bird over there! It’s so beautiful!—Wow! It’s a rare crane. It ______ appears in this area.

（）is an area within the radiotelephone coverage of at least one VHF coast station in which continuous Digital Selective Calling is available.

A multicast router may receive thousands of multicast(71)every day for different groups. If a router has no knowledge about the membership status of the(72), it must broadcast all of these packets. This creates a lot of traffic and consumes(73). A better solution is to keep a list of groups in the network for which there is at least one loyal member.(74)helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the(75)packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.

When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.

《海上交通事故报告书》应当如实写明：（）

根据《海上交通事故调查处理条例》的规定，航行船舶发生海上交通事故后的报告程序，（）提法正确。

我国海上交通事故调查处理条例规定，（）海上交通事故，（）海上交通事故报告书。

One of the most important characteristics of OSPF is Multiple areas. Which statement best describes why this feature is such an important enhancement to earlier routing protocols?（）

There is not（）depth of water around the area centered at the lighthouse.