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Passage Four: Beijing Opera is the most representative of all Chinese traditional dramatic art forms and the largest Chinese opera form. Having a history of about 200 years, it is developed from absorbing( 吸收 )many other dramatic forms, mostly from the local drama 'Huiban', which was popular in South China during the 18th century. It is a scenic (戏剧的) art integrating music, performance, literature, aria, and face painting. Theatrical art forms in many other countries do not present singing, dancing and spoken parts in one single drama. An opera singer, for example, neither dances nor speaks on stage; there are no singing or dancing parts in a modern play; in a dance drama, the dancer has no speaking role and does not sing either. Traditional Chinese drama, including Beijing Opera, is a kind of entertainment which includes spoken parts, singing, dancing and acrobatics. In addition to its presence in China, Beijing Opera has spread to many other places. Mer Lanfang, one of the most famous performers( 表演者 )of all time, was the first to introduce Beijing Opera to foreigners and made highly successful tours to foreign countries. “You will be puzzled( 困惑 )all the way through and a little bored from time to time; but you will be charmed and interested. You will be strongly attracted to Beijing Opera even if you know nothing of the dramatic background. "This is how one American traveller described his firs experience in watching Beijing Opera. Beijing Opera is China’s national opera and it is full of Chinese cultural traditions. Welcome to China and enjoy Beijing Opera!
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【单选题】已知向量 m , n 满足 m =(2,0), n = .在△ ABC 中, =2 m +2 n , =2 m -6 n , D 为 BC 边的中点,则| |等于(  ).
A.
2
B.
4
C.
6
D.
8
【多选题】按照《全国统一建筑工程预算工程量计算规则》,正确的工程量计算规则有()。
A.
间壁墙所占体积在计算地面垫层时应予以扣除
B.
展开宽度小于300mm的挑檐面积不并入墙面抹灰中
C.
楼地面找平层按主墙间净面积计算
D.
室内管沟所占面积包含在整体地面面层中
E.
天棚装饰按主墙间实铺面积计算
【单选题】已知向量 m , n 满足 m =(2,0), n =( 3 2 , 3 2 ) .△ABC, AB =2 m +2 n , AC =2 m -6 n ,D为BC边的中点,则 | AD | =(  )
A.
2
B.
4
C.
6
D.
8
【单选题】已知向量a=(2,-3,1), b=(1,-1,3),c=(1,-2 0),则(a×b)·c=
A.
6
B.
0
C.
8
D.
2
【单选题】下列混凝土构件定额工程量的计算规则,正确的是( )。
A.
整体楼梯包括休息平台、平台梁、斜梁及楼梯梁,按水平投影面积计算,不扣除宽度在 200mm 以内的楼梯井,伸入墙内部分不另增加。
B.
雨篷,按伸出墙外的板底水平投影面积计算,伸出墙外的牛腿不另计算。
C.
台阶按水平投影面积计算,设计混凝土用量超过定额含量时,应调整。台阶与平台的分界线以最上层台阶的外口增 500mm 宽度为准,台阶宽以外部分并入地面工程量计算。
D.
空调板按板式雨篷以板底水平投影面积计算,套用复式雨篷定额。
【单选题】已知两个非零向量 a 与 b ,定义| a × b |=| a || b |sinθ,其中θ为 a 与 b 的夹角.若 a =(-3,4), b =(0,2),则| a × b |的值为(  )
A.
-8
B.
-6
C.
6
D.
8
【单选题】在铁盐检查中,为什么要加过硫酸铵
A.
使Fe2+→Fe3+
B.
防止Fe3+水解
C.
调节反应灵敏度
D.
调节溶液酸度
【单选题】已知向量m,n满足m=(2,0),n= ,在 中,若 2m 2n, 2m-6n,D是BC的中点,则| |=
A.
2
B.
4
C.
6
D.
8
【简答题】已知向量 a={ -6,8,0 },则 |a|= 。
【单选题】已知向量 =(1,1,0), =(-1,0,2),且 + 与 - 互相垂直,则 的值是(   )
A.
-2
B.
2
C.
6
D.
8
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