24.Piano
The ancestry of the piano can be traced to the early keyboard instruments of the fifteenth and sixteenth centuries --- the spinet, the dulcimer, and the virginal. In the seventeenth century the organ, the clavichord, and the harpsichord became the chief instruments of the keyboard group, a supremacy they maintained until the piano supplanted them at the end of the eighteenth century. The clavichords tone was metallic and never powerful; nevertheless, because of the variety of tone possible to it, many composers found the clavichord a sympathetic instrument for intimate chamber music. The harpsichord with its bright, vigorous tone was the favorite instrument for supporting the bass of the small orchestra of the period and for concert use, but the character of the tone could not be varied save by mechanical or structural devices.
The piano was perfected in the early eighteenth century by a harpsichord maker in Italy . This instrument was called a piano e forte , to indicate its dynamic versatility; its strings were struck by a recoiling hammer with a felt-padded head. The wires were much heavier in the earlier instruments. A series of mechanical improvements continuing well into the nineteenth century, including the introduction of pedals to sustain tone or to soften it, the perfection of a metal frame, and steel wire of the finest quality, finally produced an instrument capable of myriad tonal effects from the most delicate harmonies to an almost orchestral fullness of sound, from a liquid, singing tone to a sharp, percussive brilliance.
5W理论让你提高英语四级听力
四级听力重点词汇学习:会听也要会读
英语备考辅导冲刺专访(实录)
CET6长对话名师评析
大学英语四级冲刺:听力猜题攻略
考试听力答案--A卷
考试听力篇章二答案
高分特训:四级听力考试5种方法提高
如何提高英语四级听力
听力备考:多积累多练习
名师举例说明 四级听力冲刺核心技巧
名师教你四级备考半年复习计划
英语四六级高效复习技巧之听力篇
四级听力高频词汇清单:会听还要会读
关于听力的问题
四六级听力:克服误区 掌握技巧
听力复合式听写必杀技巧
四级听力提分技巧:正确接收有效信息
大学英语四级听力40条常考习语
听力篇章名师解析
听力Passage2解析
大学英语四级听力重点场景词汇短语集合
四级英语考试答案:四级听力
听力长对话短期突破:从真题入手
考试听力冲刺计划
文都教育:大学英语四级听力点评
英语听力对话拿分技巧
四级听力4阶段冲刺备考安排
四级考试听力理解短文原文
英语四级听力考试十大热门问题解答
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |