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No one can prevent me from hunting for a bright future. She read a poem which depicts the splendor of the sunset. 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. My doctor said I should vary my diet more. The book took ten years of thorough research. There is a growing gap between the rich and the poor. I wish to propose a toast to our friendship. As the industry developing in these years,most of the rivers have been contaminated by sewage (污水). 共用题干 第三篇The Development of BalletBallet is a dance form that has a long history.The fact that it survives to this day shows that it has adjus- ted as times have changed.Ballet began in the royal courts during the Renaissance.At that time it became common for kings and queens,as well us other nobility(贵族),to participate in pageants that included music,poetry,and dance.As these entertainments moved from the Italian courts to the French ones,court ladies began participating in them. Though their long dresses prevented much movement , they were able to perform elaborate (复杂的) walking patterns.It was not until the 1600s that women dancers shortened their skirts,changed to flat shoes, and began doing some of the leaps and turns performed by men.It was also in the 1600,that professional ballet began.King Louis ⅪⅤ of France,himself a devoted dan- cer,founded the Royal Academy of Dance.The five basic feet positions from which all ballet steps begin were finalized.In the late 1700s another important change occurred.Ballet began to tell a story on its own,It was no longer simply dance to be performed between acts of plays.Elaborate wigs(假友)and coetumes were eliminated.By the early 1 800s dancers learned to rise on their toes to make it appear that they were floating. Classical ballet as we know it today was influenced primarily by Russian dancing. The Russians re-mained interested in ballet when it declined in other European countries in the mid-1800s.One of the most influential figures of the early 20th century was Sergei Diaghilev.His dance company,the Ballets Russes, brought a newenergy and excitement to ballet.One of his chief assistants,George Balanchine,went on to found the New York City Ballet in 1948 and to influence new generations of dancers. The collision event is an indicator of the tension between the two Middle East countries.