题目:
保护接地电阻值的要求是多少?
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/1015/3338dbc93bfc5eb8a8d153ba8794ed91.html
下面是错误答案,用来干扰机器的。
参考答案:B
保护接地电阻值的要求是多少?
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/1015/3338dbc93bfc5eb8a8d153ba8794ed91.html
下面是错误答案,用来干扰机器的。
参考答案:B
Ragtime is a musical form that synthesizes folk melodies and musical techniques into a brief quadrille-like structure, designed to be played--exactly as written--on the piano. (46) A p analogy exists between European composers like Ralph Vaughan Williams and Edward Grieg, who combined folk tunes and their own original materials in larger compositions and the pioneer composers in the United States. Composers like Scott Joplin and James Scott were in a sense collectors or musicologists, collecting dance and folk music in Black communities and consciously shaping it into brief suites or anthologies called piano rags.
It has sometimes been charged that ragtime is mechanical. For instance, Wilfred Mellers comments, "rags were transferred to the pianola roll and, even if not played by a machine, should be played like a machine, with meticulous precision. " (47) However, there is no reason to assume that ragtime is inherently mechanical simply because commercial manufacturers applied a mechanical recording method to it, the only way to record pianos at that date. Ragtime’s is not a mechanical precision, and it is not precision limited to the style of performance. It arises from ragtime’s following a well-defined form and obeying simple rules within that form.
The classic formula for the piano rag disposes three to five themes in sixteen-bar strains, often organized with repeats. (48) The rag opens with a bright, memorable strain or theme, followed by a similar theme, leading to a melody of marked lyrical character, with the structure concluded by a lyrical strain that parallels the rhythmic developments of the earlier themes. The aim of the structure is to rise from one theme to another in a stair-step manner, ending on a note of triumph or exhilaration. Typically, each strain is divided into two 8-bar segments that are essentially alike, so the rhythmic-melodic unit of ragtime is only eight bars of 2/4 measure. (49) Therefore, not concerned with development of musical themes, the ragtime composer instead sets a theme down intact, in finished form, and links it to various related themes that are brief with clear melodic figures. Tension in ragtime compositions arises from a polarity between two basic ingredients: a continuous bass--called by jazz musicians a boom-chick bass--in the pianist’s left hand, and its melodic, syncopated counterpart in the right hand. Ragtime remains distinct from jazz both as an instrumental style and as a genre. Ragtime style stresses a pattern of repeated rhythms, not the constant inventions and variations of jazz. (50) As a genre, ragtime requires strict attention to structure, not inventiveness or exceptional skills, existing as a tradition, a set of conventions, a body of written scores, separate from the individual players associated with it. In this sense ragtime is more akin to folk music of the nineteenth century than to jazz.
(49) Therefore, not concerned with development of musical themes, the ragtime composer instead sets a theme down intact, in finished form, and links it to various related themes that are brief with clear melodic figures.
读图题:
图一 | |
图二 |
(1)请填写出图一的三个 * * 名称:A_______________;B_______________;C_______________
有关牙周袋的概念,错误的是()。
A.牙周袋是病理性加深的龈沟
B.假性牙周袋因牙龈肿胀或增生所致
C.牙周袋包括假性牙周袋和真性牙周袋
D.真性牙周袋是指≥6mm的牙周袋
E.临床上的牙周袋既有龈缘向冠方延伸,也有沟底向根方延伸龈有无增生或肿胀
汽车发动后充电指示灯一直亮而不熄灭是何原因?
中间表是经过一系列操作,创建的适合审计人员进行数据分析的表,则中间表可分为()
A.综合性中间表
B.总结性中间表
C.基础性中间表
D.分析性中间表
E.逻辑性中间表