更多"The four standard light colors used"的相关试题:
[单项选择]A light used to signal passing intentions must be an（）.
A. alternating red and yellow light
B. alternating white and yellow light
C. all-round white or yellow light
D. all-round white light only
[单项选择]The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.
A. alternator
B. turbo-charger
C. remote controller
D. windlass
[单项选择]With four-stroke engines, it takes four revolutions of the crank shaft to make （） power stroke(s).
A. 1
B. 2
C. 4
D. 8
[单项选择]A flashing light is a light that（）.
A. flashes at regular intervals at a frequency of 120 flashes or more per minute
B. is yellow in color
C. is visible over an arc of the horizon of not less than 180°nor more than 225°
D. All of the above
[单项选择]A vessel showing a green light over a white light in a vertical line above the level of the sidelights is（）.
A. engaged in underwater construction
B. under sail and power
C. a pilot vessel
D. trawling
[单项选择]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
[单项选择]A towing light is a yellow light having the same characteristics as a(n)（）
A. special flashing light
B. anchor light
C. sternlight
D. masthead light
[单项选择]A light that has a light period shorter than its dark period is described as（）.
A. flashing
B. pulsating
C. occulting
D. alternating
[判断题]桥梁结构阻尼特性的测定，常用对数衰减率δ表示。δ=lnAi/Ai+1，式中：Ai和Ai+1为任意两个波的振幅值，可直接从衰减曲线上量取。
[判断题]煤的磨损性我国多数AI为20--40，只有少数煤AI小于70。
[单项选择]AI-808调节器CtrL控制方式中（）采用AI人工智能调节/PID调节。
A. CtrL＝0
B. CtrL＝1
C. CtrL＝2
D. CtrL＝3
[单项选择]Horton Point Light（）.
A. is 14 feet above sea level
B. has a fixed green light
C. is shown from a white square tower
D. is synchronized with a radio beacon
[单项选择]A towing light（）.
A. flashes at regular intervals of 50-70 flashes per minute
B. is yellow in color
C. shows an unbroken light over an arc of the horizon of not less than 180°nor more than 225°
D. All of the above
[单项选择]An alternating light（）.
A. shows a light with varying lengths of the lighted period
B. shows a light that changes color
C. marks an alternate lesser-used channel
D. is used as a replacement for another light
[判断题]在Photoshop中既可以将某一条路径导出成为AI文件，也可以将全部路径导出成为AI文件。
[单项选择]Which statement concerning Montauk Point Light is TRUE（）.
A. The light comes on at sunset
B. There is an emergency light if the main light is extinguished
C. The height of the light is 24 feet
D. The tower is painted with black and white stripes
