更多"The expression FIRST MAGNITUDE is u"的相关试题:
[单项选择]Plain language is usually used on marine weather（）.
A. forecasts
B. observations
C. analyses
D. reports
[单项选择]Oil mist detectors are usually used on board to detect oil mist density within （）.
A. the engine crankcase
B. the engine scavenge boxes
C. drain tanks
D. fuel tanks
[单项选择]The （）pump is usually used as the lubricating oil pump.
A. turbine
B. screw
C. vaneejector
D. centrifugal
[单项选择]The （）pump is usually used as the emergency bilge pump.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]（） is not usually used in liquid cargo systems.
A. Hydraulic drive systems
B. Electric drive systems
C. Steam drive systems
D. Man-powered drive systems
[单项选择]A first magnitude star is（）.
A. 2.5 times as bright as a second magnitude star
B. 3 times as bright as a second magnitude star
C. 5 times as bright as a second magnitude star
D. 10 times as bright as a second magnitude star
[单项选择]The （）pump is usually used as the bilge feed pump to an oily water separator.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
A. heavy-walled drill pipe
B. tool joint
C. down hole tool
D. drill collar
[单项选择]A smooth，tapered pin，usually of wood，used to open up the strands of a rope for splicing is called a(n)（）.
A. batten
B. bench hook
C. awl
D. fid
[单项选择]A smooth, tapered pin, usually of wood, used to open up the strands of a rope for splicing is called a (n)（）.
A. batten
B. bench hook
C. stabilizers
D. fid
[单项选择]The first communication satellite was used for the purpose of（）.
A. taking the place of the radio system
B. introducing a new life-saving system
C. saving the vessels in distress
D. improving the communication on land
[单项选择]The magnitude of a moment is the product of the force and（）.
A. time
B. lever arm
C. displacement
D. angle of inclination
[单项选择]Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine （）
A. camshaft beatings
B. main bearings
C. piston crowns
D. cylinder walls
[单项选择] You define the following regular expression of currency values: regex tx = new regex("^-?/d+(/./d{2})?$") You are required to write code that will be used to find whether a string in the variable named Bill matches the regular expression or not. You are also required to use this code as the expression in a conditional statement and need to know which code segment to use. What should you do?（）
A. The tx.Matches（Bill）
B. The tx.Equals（Bill）
C. The tx.Match（Bill）
D. The tx.IsMatch（Bill）
[单项选择]Which expression has the different meaning from entry into force ? “entry into force” means is（）.
A. coming into effect
B. moving to full effect
C. being based on force
D. coming into force
[单项选择]The expression DROP ANCHOR means（）.
A. Hold anchor
B. Leave anchor
C. Let go anchor
D. Weigh anchor
[单项选择]Weather forecast messages are usually（）.
A. Given only to TV stations
B. Transmitted only by commercial broadcast stations
C. Broadcast in plain language
D. Broadcast immediately on VHF Channel 16 and 2182 kHz
[单项选择]Rivets are usually made of（）.
A. wrought-iron
B. aluminum
C. high-tensile steel
D. mild steel
