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Music comes in many forms; most countries have a style of their own. (67) the turn of the last century when jazz (爵士乐) was born, America had no prominent (68) of its own. No one knows exactly when jazz was (69) , or by whom, but it began to be (70) in the early 1900s. Jazz is America’s contribution to (71) music. In contrast to classical music, which. (72) formal European traditions, jazz is a spontaneous and free form. It bubbles with energy, (73) the mood, interest, and emotions of the people. In the 1920s jazz (74) like America, and (75) it does today. The (76) of this music are as interesting as the music (77) . American Negroes, or blacks, as they are called today, were the jazz (78) . They were brought to Southern States (79) slaves. They were sold to plantation owners and forced to work long (80) . When a Negro died his friends and relatives (81) a procession to carry the body to the cemetery. In New Orleans, a band often accompanied the. (82) . On the way to the cemetery the band played slow, solemn music suited to the occasion. (83) on the way home the mood changed. Spirits lifted. Death had removed one of their (84) , but the living were glad to be alive. The band played (85) music, improvising (即兴表演) on both the harmony and the melody of the tunes (86) at the funeral. This music made everyone want to dance. It was an early form of jazz.

A. as
B. so
C. either
D. neither

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Most people do not think of fishes and other sea animals as having voices, and of those who are aware of the fact that many of them can "speak", few understand that these "conversations" have significance. Actually, their talk may be as meaningful as much of our own. For example, some sea animals use their "voices" to locate their food in the ocean expanses (广阔的区域); others use their "voices" to let their fellows know of their locations; and still others, as a means of obtaining mates. Sometimes, "speaking" may even mean the difference between life and death to a sea animal. It appears in some cases that when a predator (食肉动物) approaches, the prey (被捕的动物) depends on no more than the sounds it makes to escape.Fish sounds are important to man, also. By listening to them, he can learn a great deal about the habits of creatures that make them, the size of the School they form, the patterns of their migrations, and the nature of the environments in which they live. He can also apply this information to the more effective utilization of the listening spots he has set up to detect enemy submarines (潜水艇). A knowledge of fish sounds can avoid confusion and unneeded effort when a "new" sound is picked up and the sound sentry (哨兵) must decide whether or not to call an alarm. Why was Helen Keller blind, deaf and unable to speak()

A. Because she’d been born that way.
Because a horse had kicked her.
C. Because she’d had a very high fever.
D. Because she’d had a bad fall.

Music comes in many forms; most countries have a style of their own. (67) the turn of the last century when jazz (爵士乐) was born, America had no prominent (68) of its own. No one knows exactly when jazz was (69) , or by whom, but it began to be (70) in the early 1900s. Jazz is America’s contribution to (71) music. In contrast to classical music, which. (72) formal European traditions, jazz is a spontaneous and free form. It bubbles with energy, (73) the mood, interest, and emotions of the people. In the 1920s jazz (74) like America, and (75) it does today. The (76) of this music are as interesting as the music (77) . American Negroes, or blacks, as they are called today, were the jazz (78) . They were brought to Southern States (79) slaves. They were sold to plantation owners and forced to work long (80) . When a Negro died his friends and relatives (81) a procession to carry the body to the cemetery. In New Orleans, a band often accompanied the. (82) . On the way to the cemetery the band played slow, solemn music suited to the occasion. (83) on the way home the mood changed. Spirits lifted. Death had removed one of their (84) , but the living were glad to be alive. The band played (85) music, improvising (即兴表演) on both the harmony and the melody of the tunes (86) at the funeral. This music made everyone want to dance. It was an early form of jazz.

A. demonstrated
B. composed
C. hosted
D. formed

在微机系统中,CPU是在时钟信号控制下,按节拍有序地执行指令序列。从取指令开始,经过分析指令、对操作数寻址,然后【 】保存操作结果,这个过程称为指令执行周期。

Helen Keller was born a healthy normal child in Alabama in 1880. However, an illness with a high fever struck her when she was still a child. She became deaf, blind, and unable to speak. For little Helen, the world was suddenly a dark and frightening place. She was wild and stubborn. Several years later a miracle came into Helen’s life when Anne Sullivan, a strong and loving person, became Helen’s teacher. Miss Sullivan’s teaching changed the child into a responsible human being. Through her help Helen Keller learned to communicate with those around her, and as she grew older, others benefited from her unique insights and courage. Miss Keller died in 1968, but her spirit lives on. It lives on in her articles and books and in the stories of people who were fortunate enough to meet her during her lifetime. Helen Keller is remembered as ()

A. a political leader.
B. an example to others.
C. a famous scientist.
D. an extraordinary doctor.

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