When a switch port is used as a VLAN trunk, which of the following trunk modes are valid? (Select all that apply.)

A． Blocking

B． Auto

C． Desirable

D． On

E． Transparent

F． Learning

[单选题]When the Captain of the Port or Officer in Charge，Marine Inspection issues an order of suspension to the operator of a vessel concerning oil transfer operations，it（）.A . is always effective immediatelyB . includes a statement of each condition requir

[单选题]When will you leave the port? ________ February 4A．onB．inC．atD．about

[填空题] Access port是可以承载（）个VLAN的端口；Tagged port是可以承载（）个VLAN的端口。

[单选题]When multiple routers are used in interconnected networks,the routers exchange information about（）using a dynamic routing protocolA．destination addressesB．IP addressesC．work addressesD．router addresses

[主观题]When ‘Final’ is used in class, method and property, what dose itmean?

[单选题]When whistle signals are used for launching lifeboats，one short blast means（）.A . use the float-free method onlyB . lower all boatsC . raise all boatsD . drill is over，secure all boat

[问答题] 请讲述Port-VLAN和Tag-VLAN的特点及应用环境。

[单选题]When I was a child I used ______ swimming in the lake.A． to goingB． goingC． to goD． go

[单选题]When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.A . check valve installed in the lineB . shut off valve at a manifold near the pumpC . q

[单选题]Wale shores would be used when drydocking a vessel with（）.A . tumble homeB . excessive deadriseC . excessive trimD . a list