更多"[单选题] How is the intensity of a lig"的相关试题:
[单选题]Yesterday we expressed our congratulations to Tom, who ________ chairman of our Students’ Association.
A.has elected
B.had elected
C.has been elected
D.had been elected
[单选题] A light having characteristics which include color variations is defined as ______.
A. switching
B. alternating
C. oscillating
D. fluctuating
[单选题] The four standard light colors used for lighted aids to navigation are red，green，white，and ______．
A.purple
B.orange
C.blue
D.yellow
[单选题] Entrance Light Vessel beamed port，stopped eng. & Tug Ever took pilot off. From this remark，the ship is likely ______.
A. making inward operation
B. making outward operation
C. making cargo operation
D. at anchor
[单选题] A light signal consisting of three flashes means _______ .
A. I am in doubt as to your actions
B. My engines are full speed astern
C. I desire to overtake you
D. I am operating astern propullsion
[单选题] A vessel showing a yellow light over a white light at night is a vessel ______．
A.engaged in piloting
B.towing astern
C.engaged in fishing
D.in distress
[单选题] The luminous range of a light takes into account the ______．
A.glare from background lighting
B.existing visibility conditions
C.elevation of the light
D.observer's height of eye
[单选题] A small light tackle with blocks of steel or wood
That is used for miscellaneous small jobs is called a ______．
A.snatch block
B.threefold purchase
C.handy-billy
D.chockablock
[单选题] The light on a life jacket must be replaced ______．
A.when the power source is replaced
B.each year after installation
C.every six months
D.when it is no longer serviceable
[单选题] The range of a light on Admiralty Charts is normally the ______.
A. nominal range
B. luminous range
C. geographical range
D. visible range
[单选题]I prefer light tea___strong tea.
A.than
B.or
C.to
D.few
[单选题] As defined in the Rules，a towing light is a yellow light having the same characteristics as a（n）______．
A.masthead light
B.all-round light
C.sidelight
D.sternlight
[单选题]Safety light可以使用约______。
A.8小时
B.12小时
C.24小时
D.48小时
[单选题]救生船上有______个Locator light。
A.1
B.2
C.3
D.4
