皮皮学,免费搜题
登录
搜题
【判断题】
 The erhu is a kind of violin (fiddle) with two strings which, together with zhonghu, gaohu, sihu, etc, belongs to the "huqin" family. It is said that its origin would be dated up to the Tang Dynasty (618–907) and related to the instrument called xiqin originated from a Mongolian tribe Xi. During the Song Dynasty (960–1279), the second generation of the huqin was among the instruments played at the imperial banquets. During the Dynasties of Ming (1368–1644) and Qing (1644–1911), the erhu underwent a great development at the time of the golden age of the local operas. The erhu then developed in different "schools". Two famous artists Hua Yanjun (1893–1950) and Liu Tianhua (1895–1932) made an exceptional contribution to the improvement of the erhu, and it was indeed due to the latter that the erhu, an instrument mainly for accompaniment in an opera, becomes a solo instrument. The erhu sounds similar to human voice, and can imitate many natural sounds such as birds and horses. It is a very expressive instrument, most well-known for playing melancholic tune, but also capable of playing merry melody. The erhu often plays an important role in the national orchestras. In the smaller orchestras, there are usually 2 to 6 erhus, in the largest, l0 to 12. In fact, the erhu plays the same role as the violin in the western orchestras. 15. In the traditional Chinese orchestras, the erhu plays the same role as the violin in the western orchestras. A. True B. False
A.
正确
B.
错误
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【判断题】本年累计实际产量与本年计划单位成本之积称为按本年实际产量计算的本年累计总成本。 ( )
A.
正确
B.
错误
【多选题】下列关于经纬仪的叙述中,正确的是()
A.
经纬仪测水平角时,以望远镜目镜中十字丝的横丝对准目标;测垂直角时,以纵丝对准目标
B.
经纬仪望远镜的瞄准目标之前,先进行目镜调焦使十字丝清晰,再进行物镜调焦使目标像清晰,并且必须消除视差
C.
经纬仪整平的方法是旋转脚螺旋,使平盘水准管在平行于一对脚螺旋的方向上及其垂直方向上气泡都居中
D.
光学经纬仪的度盘读数装置包括光路系统和测微器
【判断题】本年累计实际产量与本年计划单位成本之积称为,按本年实际产量计算的本年累计总成本。
A.
正确
B.
错误
【单选题】多功能数控车床是采用来驱动主轴?
A.
三相异步电动机
B.
直流或交流主轴控制单元
C.
伺服电动机
D.
步进电机
【单选题】数控车床主轴电机采用( )控制。
A.
直接
B.
正反转
C.
单独
【简答题】数控机床主轴控制分正转、反转及停止。主轴的转速分为_____调速和_____调速,电气调速通常采用______调速或_____________调速。对加工中心、有些数控车床还需采用_____控制和_____控制。
【单选题】数控车床主轴电动机Ml采用(    )控制。
A.
直接    
B.
正反转    
C.
单独
【简答题】朗读练习五阶段包括:1、合适音量:比正常音量大;2、念清楚字、词、句;3、控制声音:练声调起伏;4、 ;5、语气恰当。
【判断题】通常的数控车床主轴采用异步电动机变频调速,只有速度环和电流环控制,可以实现位置控制。
A.
正确
B.
错误
【简答题】背景材料: 某一级公路工程K9+000~K36+000段路面结构形式为:底基层采用填隙碎石、基层采用水泥稳定碎石、面层采用C30水泥混凝土。施工工期安排在某年夏天,日间气温高达36℃,工程任务重、工期紧。路面施工完成后,该项目的施工单位对路面底基层、基层、面层进行了施工质量自检。对填隙碎石底基层检验实测了平整度、纵断高程、宽度、厚度、横坡。对水泥混凝土面层的检验实测了平整度、中线平面偏位、抗滑构...
相关题目: