单选题Vessels in port may use（）for receiving typhoon warnings during the typhoon season.A their transmittersB their receiversC their radarsD their lorans

A receiving host has failed to receive all of the segments that it should acknowledge.

What can the host do to improve the reliability of this communication session?

A．Start a new session using UDP

B．Obtain a new IP address from the DHCP server

C．Use a different source port for the session

D．Decrease the sequence number

E．Decrease the window size

材料：If，by reason of or in compliance with any such directions or recommendations，the vessel does not proceed to the port or ports named in the Bill of Lading or to which she may have been ordered pursuant thereto，the Vessel may proceed to any port as directed or recommended or to any safe port which the Owners in their discretion may decide on and there discharge the cargo．Such discharge shall be deemed to be due fulfillment of the contract of affreightment and the Owners shall be entitled to freight as if discharge had been effected at the port or ports named in the Bill of Lading or to which the Vessel may have been ordered pursuant thereto．

问题：If the vessel does not, under the directions of the Charterer, proceed to the port or ports named in the Bill of Lading or to which she may have been ordered pursuant thereto to, she may proceed to all the following ports except ______ ．

A.any port as directed

B.any port as recommended

C.any safe port which the Owners in their discretion may decide on

D.the port or ports of origin

At the substituted port, the carrier is entitled to ______ freight if he had dilivered full cargo there．A.full freight

B.half freight

C.no freight

D.reasonable freight

The contract of affreightment is referred to ______ ．A.a contract of carriage by which the carrier is entitled to carry certain amount of cargo in a specified time by any vessel or vessels either belonging to himself or to others

B.a contract of carriage, such as Gencon

C.a contract of trade

D.a contract of sales

This is a ______ ．A.a clause of a contract

B.an explanation of a clause in a contract

C.a requirement from a government

D.an article of an international convention

请帮忙给出每个问题的正确答案和分析，谢谢！

You may BEST turn a twin-screw vessel about，to the right，in a narrow channel by using ______.

A.Both engines ahead and helm

B.One engine only

C.Port engine ahead and the starboard engine astern

D.Both engines astern and use helm

Vessels in port may use ______ for receiving typhoon warnings during the typhoon season．

A.Their transmitters

B.Their receivers

C.Their radars

D.Their lorans

While troubleshooting a network connectivity issue, you suspect that a router may be missing a route, or may be receiving bad routing information to a destination. What command should you issue to view the route that the router will use to reach a given destination?（）

A. ping

B. trace

C. show ip route

D. show interface

E. show cdp neighbors

Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by ______.

A.Notices to Mariners

B.Sailing Directions

C.List of Lights and Signals

D.Guide to Port Entries

You are trying to connect directly into the LAN prot of a Ezonexam router. You want to telnet to the local Cisco router using TCP/IP but cannot create a session.

What should you do to resolve the problem?

A. Use a straight-through cable to connect your computer's COM port to the router's console port.

B. Use a crossover cable to connect your computer's COM port to the router's console port.

C. Use a straight-through cable to connect your computer's COM port to the router's Ethernet port.

D. Use a crossover cable to connect your computer's Ethernet port to the router's Ethernet port.

E. Use a rollover cable to connect your computer's Ethernet port to the router's Ethernet port.

F. Use a straight-through cable to connect your computer's Ethernet port to the router's Ethernet port.

G. None of the above

Deep draught vessels may have to make use of the height of tide in order to have a safe under keel clearance in areas where depths are______．

A.sufficient

B.normal

C.abnormal

D.Critical