下列有关动静脉畸形，叙述不恰当的是A．发生多少的排列为：顶叶>额叶>颞叶 B．最常见

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.

(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.

男孩，8岁，因畏寒、发热8天，伴纳差、腹胀、腹痛，大便每天1—2次，略稀，当地医院用青霉素治疗热不退转来。体检：体温39.2℃神志清，精神萎靡，表情淡漠，舌苔厚，心肺无异常，腹略胀，肝肋下2cm，脾肋下3cm，质软，经血培养证实为伤寒。

假设信息该病人治疗后症状消失，病后4个月大便仍排菌。健康带菌者体内伤寒杆菌隐藏最多的器官是（）

A.肝脏

B.脾

C.肠道淋巴结

D.骨髓

E.胆囊

从国际经验和中国员工福利的发展时间不难看出，商业保险公司在企业员工福利中有关风险管理和保险的福利项目中具有优势，特别是在基本养老保险、基本医疗保险、团体意外伤害保险等项目中，具有其他金融业者不可比拟的专业优势。（ ）

A．对

B．错

实施下列行为的人员均为15周岁，应当追究刑事责任的是（）。

A.甲在聚众斗殴中致人死亡

B.乙非法拘禁他人使用暴力致人重伤

C.丙贩卖海洛因8000克

D.丁使用暴力 * * 淫幼女

有效地进行教学必须遵循的基本要求叫做（）

A.教学规律

B.教学原则

C.教学方法

D.教学程序