The students in a certain physical education class are on either the football team or the basketball team, are on both these teams, or are not on either team. If 12 students are on the football team, 15 students are on the basketball team, 8 students are on both teams, and 9 students are not on either of these teams, how many students are in the class?

You are preparing to slush a stay on your vessel by lowering yourself down the stay in a bosun’s chair.The proper way to do this is to ride down the stay on a riding shackle（）.

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（）.

Make tug（）on the port quarter!

When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network,how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port?（）

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the （）

Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?（）

Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?

A vessel crossing a river on the Western Rivers has the right of way over（）.

Once the port has been named and accepted by，or on behalf of，the Shipowner，he can not afterwards refuse to go（）__ on the ground that it is not safe.

The port gang way caught on a（）on the wharf and was severely damaged.

When a tug is pulling on a hawser at right angles to the ship，and the pilot wants to come ahead or astern on the ship’s engine，care must be taken that the pilot（）.