单选题A chemical additive to LPG gives it a characteristic（）.AodorBcolorCpressureDdensity
单选题
A chemical additive to LPG gives it a characteristic（）.
A
odor
B
color
C
pressure
D
density
参考解析
解析：
暂无解析
相关考题：
To get well, ( ). A、we are going to give the patient a chemical treatmentB、the patient needs a chemical treatmentC、the doctors suggest a chemical treatment of the patientD、a chemical treatment is necessary
Usetheoperators">",whichstatementsaretrue?() A.000001000000000000000000000000005gives10000000000000000000000000000000B.000001000000000000000000000000005gives11111100000000000000000000000000C.110000000000000000000000000000005gives11111110000000000000000000000000D.110000000000000000000000000000005gives00000110000000000000000000000000
An additive used to improve the ability of a lube oil to reduce friction is known as a/anA.suppressant additiveB.dispersant additiveC.extreme pressure additiveD.viscosity improver additive
Gas Carriers are generally referred to the cargo ships constructed or adapted and used for the carriage of ________ ．A.LNG in bulkB.LNG ＆ LPG in bulkC.LPG in bulkD.LNG ＆ LPG and other liquefied gas products
He is a heavy smoker and even his hair__________the smell of cigarettes．A.gives upB.gives awayC.gives offD.gives in
共用题干第三篇Ways to Create Colors in a PhotographThere are two ways to create colors in a photograph.One method called additive,starts with three basic colors and adds them together to produce some other color. The second method,called subtractive,starts with white light(a mixture of all colors in the spectrum)and,by taking away some or all other colors,leaves the one desired.In the additive method,separate colored lights combine to produce various other colors.The three additive primary colors are green,red and blue(each providing about one-third of the wavelengths in the total spectrum).Mixed in varying proportions,they can produce all colors.Green and red light mix to produce yellow,red and blue light mix to produce magenta(a purplish pink);green and blue mix to produce cyan(a bluish green).When equal parts of all three of these primary-colored beams of light overlap（重叠）,the mixture appears white to the eye.In the subtractive process colors are produced when dye（染料）absorbs some wavelengths and so passes on only part of the spectrum.The subtractive primaries are cyan,magenta and yellow; these primaries or dyes absorb red,green and blue wavelengths respectively,thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red,green and blue.Properly combined,the subtractive primaries can absorb all colors of light, producing black.But,mixed in varying proportions,they too can produce any color in the spectrum.Whether a particular color is obtained by adding colored lights together or by subtracting some light from the total spectrum,the result looks the same to the eye.The additive process was employed for early color photography. But the subtractive method,while requiring complex chemical techniques,has turned out to be more practical and is the basis of all modern color films.What does the passage mainly discuss?A: Recent developments in camera technology.B:How to make white light.C:The additive and subtractive methods of producing color.D:The discovery of the spectrum.
共用题干第三篇Ways to Create Colors in a PhotographThere are two ways to create colors in a photograph.One method called additive,starts with three basic colors and adds them together to produce some other color. The second method,called subtractive,starts with white light(a mixture of all colors in the spectrum)and,by taking away some or all other colors,leaves the one desired.In the additive method,separate colored lights combine to produce various other colors.The three additive primary colors are green,red and blue(each providing about one-third of the wavelengths in the total spectrum).Mixed in varying proportions,they can produce all colors.Green and red light mix to produce yellow,red and blue light mix to produce magenta(a purplish pink);green and blue mix to produce cyan(a bluish green).When equal parts of all three of these primary-colored beams of light overlap（重叠）,the mixture appears white to the eye.In the subtractive process colors are produced when dye（染料）absorbs some wavelengths and so passes on only part of the spectrum.The subtractive primaries are cyan,magenta and yellow; these primaries or dyes absorb red,green and blue wavelengths respectively,thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red,green and blue.Properly combined,the subtractive primaries can absorb all colors of light, producing black.But,mixed in varying proportions,they too can produce any color in the spectrum.Whether a particular color is obtained by adding colored lights together or by subtracting some light from the total spectrum,the result looks the same to the eye.The additive process was employed for early color photography. But the subtractive method,while requiring complex chemical techniques,has turned out to be more practical and is the basis of all modern color films.Which of the following is NOT a pair of additive and subtractive primary colors?A:Yellow and blue. B: Magenta and green.C:Black and white. D:Cyan and red.
共用题干第三篇Ways to Create Colors in a PhotographThere are two ways to create colors in a photograph.One method called additive,starts with three basic colors and adds them together to produce some other color. The second method,called subtractive,starts with white light(a mixture of all colors in the spectrum)and,by taking away some or all other colors,leaves the one desired.In the additive method,separate colored lights combine to produce various other colors.The three additive primary colors are green,red and blue(each providing about one-third of the wavelengths in the total spectrum).Mixed in varying proportions,they can produce all colors.Green and red light mix to produce yellow,red and blue light mix to produce magenta(a purplish pink);green and blue mix to produce cyan(a bluish green).When equal parts of all three of these primary-colored beams of light overlap（重叠）,the mixture appears white to the eye.In the subtractive process colors are produced when dye（染料）absorbs some wavelengths and so passes on only part of the spectrum.The subtractive primaries are cyan,magenta and yellow; these primaries or dyes absorb red,green and blue wavelengths respectively,thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red,green and blue.Properly combined,the subtractive primaries can absorb all colors of light, producing black.But,mixed in varying proportions,they too can produce any color in the spectrum.Whether a particular color is obtained by adding colored lights together or by subtracting some light from the total spectrum,the result looks the same to the eye.The additive process was employed for early color photography. But the subtractive method,while requiring complex chemical techniques,has turned out to be more practical and is the basis of all modern color films.What explanation is given for the use of the subtractive method in modern color films?A: The additive process is still being developed.B:The subtractive process is more efficient.C:Subtractive colors are more realistic.D:Additive chemical techniques are too complex.
加油和LPG加气合建站中的储罐容积符合（）条件时，该合建站的等级为三级。A、LPG储罐总容积≤45m3B、LPG储罐总容积≤30m3C、LPG储罐总容积与油品储罐总容积120m3D、LPG储罐总容积与油品储罐总容积≤60m3E、LPG储罐总容积≤20m3
单选题（）as the chemical extinguisher agent, should be used for a an electric fire.ADry chemical or foamBFoam or soda acidCcarbon dioxide or foamDcarbon dioxide or dry chemical
单选题According to the Chemical Data Guide，1，3 - pentadiene possesses which characteristic? （）AColorless liquid，mild aromatic odorBPale yellow liquid，strong odorCColorless liquid，faint odorDStraw-colored liquid，sweet-odor
单选题An additive used to improve the ability of a lube oil to reduce friction is known as a/an （）.Asuppressant additiveBdispersant additiveCextreme pressure additiveDviscosity improver additive
名词解释题单体附加系（Monosomic additive line）