______published in England amplify charted detail and contain information needed for safe navigation．A.Admiralty Sailing DirectionsB.Admiralty List of LightsC.Admiralty List of SignalsD.Admiralty Notices to Mariners

Self-contained breathing apparatus is used to ______.

A.make underwater repairs to barges

B.determine if the air in a tank is safe for men

C.enter areas that may contain dangerous fumes or lack oxygen

D.resuscitate an unconscious person

A.A

B.B

C.C

D.D

E.E

It can be inferred from the passage that________

A.natural materials are safe in food processing

B.chemicals are needed in food processing

C.food poisoning can be kept under control

D.food poisoning is out of control

The Sailing Directions contain information on ______.

A.required navigation lights

B.lifesaving equipment standards

C.casualty reporting procedures

D.currents in various locations

For any information system to serve its purpose,the information must be ( ) when it is needed.

A.integral

B.available

C.irreplaceable

D.confidential

The acceptance letter must contain the order number and date as well as other information concerning the execution of the order.()

A. Syslog

B. Audit log

C. History log

D. Ping sweep reports

On small scale charts of ocean areas where hydrographic information is，in many cases，still sparse，charted shoals may be in error as regards______．

A.position

B.position，depth and extent

C.depth and extent

D.position and extent

A. offset the OADM loss at site b

B. overcome the high multiplexer loss at site a

C. amplify signal levels after the high loss through Fiber Span 1

D. adjust add channels at site B to be at the same level as the passthrough channels

E. ensure that the per channel power is higher than the minimum needed for the post-amp at Site b

______ amplify charted detail and contain information needed for safe navigation．

A.Admiralty Sailing Directions

B.Admiralty List of Lights

C.Admiralty List of Signals

D.Admiralty Notices to Mariners