以下程序的输出结果是（）。enumColor{Red，Green=2，Blue}staticvoidMain（string[]args）{Colorc=0；Colorc1=（Color）2；Console.WriteLine（"{0}，{1}"，c，c1）；Console.Read（）；}

A:Green，Red B:Red，Green C:Red，Blue D:Green，Blue

Red Hat Enterprise Linux版本分为（）。

A:Red Hat Enterprise LinuxAS B:Red Hat Enterprise LinuxES C:Red Hat Enterprise LinuxBS D:Red Hat Enterprise LinuxWS

(Red and green) light, (if mixing), (in) the right proportion, (will give) us yellow.（　）

A:Red and green B:if mixing C:in D:will give

Passage Three
The traffic lights were red when the driver reached them. To the surprise of his passenger, the car did not slow down. Unexpectedly the passenger was thrown forward in the vehicle as the driver put on his brakes at the last moment. The car stopped just in time.
"Sorry, I didn’t notice the light. I thought it was green until I saw that it was the top light which was shining."
This strange story is quite true. About ten men in every hundred are color blind in some way; women are luckier——only about one in two hundred suffers from color blindness.
In some cases, a man may not be able to see deep red. He may think that red, orange and yellow are all the same as green.
People often like one color more than others. Blue is the color of the sky and sea. Green makes us think of fields and trees. Red is the color of blood and makes some people think of danger. Black is the color of night. In the dark we cannot see what is around us so we are sometimes afraid of the unknown and do not like black as a color.

What kind of color makes people think of danger（）

A:Red. B:Green. C:Yellow. D:Black.

? ?There are two ways to create colors in a photograph. One method, called additive, starts with three basis colors and adds them together to produce some other colors. 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; green and blue mix to produce cyan. When equal parts of all three of these primary-colored beams of light overlap, the mixture appears white to the eye.
? ?In the subtractive process, colors are produced when dye (as in paint or color photographic materials) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan (a bluish green), magents (a purplish pink), and yellow; these are the pigments or dyes that absorb red, green and blue wavelengths, respectively, thus subtracting them form white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined the subtractive primaries and 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 color filter would absorb red wavelengths?

A:Red. B:Cyan. C:Magenta. D:Yellow

以下代码完成画线功能，所画线的颜色是( )。
(1)g．setColor(Color．red．green．cyan．yellow)；
(2)g．drawLine(0，0，100，100)：

A:red B:green C:yellow D:cyan

关于Red Hat Linux Enterprise，以下说法错误的是( )。

A:具有广泛的开源生态系统 B:Red Hat Linux Enterprise是红帽企业版，最新版本是Red Hat Linux Enterprise Linux5 C:适应来自世界领先硬件厂商的多种硬件平台 D:不能与现有的UNIX和Windows犟础架构实现协同工作

以下代码完成画线功能，所画线的颜色是( )。 (1)g．setColor(Color．red．green．cyan．yellow)； (2)g．drawLine(0，0，100，100)：

A:red B:green C:yellow D:cyan