The light comes on at sunset
There is an emergency light if the main light is extinguished
The height of the light is 24 feet
The tower is painted with black and white stripes
第1题：
Which statement is TRUE concerning the flash point of a substance ________．
A.It is lower than the ignition temperature
B.It is the temperature at which a substance will spontaneously ignite
C.It is the temperature at which a substance，when ignited，will continue to burn
D.It is the temperature at which the released vapors will fall within the explosive range
第2题：
Which statement is TRUE concerning combustible gas indicators ________．
A.One sample of air is adequate to test a tank
B.They do not work properly where there is a lack of oxygen
C.They will detect a lack of oxygen
D.They are calibrated to read the percentage chance of explosion
第3题：
Concerning baby-sitting and managing a paper route, which of the following statement is true?
A． Both call for daily service.
B． Both call for a sense of responsibility.
C． Neither is affected by bad weather.
D． Neither is helpful to character development.
第4题：
The LWAPP （Lightweight Access Point Protocol） is in use within the Company wireless LAN. Which statement is true about this protocol？（）
第5题：
Which is TRUE concerning immersion suits and their use ________．
A.Only a light layer of clothing may be worn underneath
B.They provide sufficient flotation to do away with the necessity of wearing a life jacket
C.They should be tight fitting
D.A puncture in the suit will not appreciably reduce its value
第6题：
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited ________．
A.It is required on all vessels
B.It may be located in a conspicuous place in the wheelhouse
C.It may be located at the bilge and ballast pump control station
D.All of the above
第7题：
Which statement concerning GPS is TRUE ________．
A.It cannot be used in all parts of the world
B.There are 12 functioning GPS satellites at present
C.It may be suspended without warning
D.Two position lines are used to give a 2D fix
第8题：
At 0900，you take the following radar ranges: Watch Hill Point 5.4 miles; Block Island Grace Point 8.3 miles. Which statement is TRUE?
A.You are within 3 nautical miles of the coast
B.The bottom in the area is sand and gravel
C.The fix is indeterminate
D.You are governed by the Inland Rules
第9题：
Which statements concerning the switch construct are true？（）
第10题：
Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.
Loop guard only operates on root ports.
Loop guard only operates on designated ports.
Loop guard only operates on edge ports.