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【单选题】
In May 1995, Andrew Lloyd Webber, creator of a string of international hit musicals and a very wealthy man, spent US $ 29.2 million on Picasso' s 'Portrait of Angel Fernanders de Soto. ' It was the highest price paid at auction for a painting since the art market crashed in 1990. Lloyd Webber has a theory that Picasso' s Blue Period paintings were influenced by Burne-Jones, the British Pre-Raphaelite master whose international reputation stood high at the turn of the century. The theory is not shared by many art historians, but that doesn' t matter to the composer. He had been looking for a Blue Period Picasso for some time. It is now extremely hard to come by Blue Period Picassos—figurative works that are drenched in melancholy, expressed by a dominant use of blue. Blue Period subjects par excellence are mothers and children or harlequins Lloyd Webber' s purchase is not the most attractive of them. He paid roughly double what the picture was worth. He seems to have got carried away when the bidding started to climb. The Picasso was one of the two highest prices of the 1994-95 auction season, and help illustrate what has been happening in this curious market. The very rich have got their confidence back, which has meant that buyers can be found for works of really outstanding quality and, very occasionally, bidding battles have driven prices back to their 1989-1990 levels. The 1980s boom collapsed in 1990. After several false dawns there are now signs that serious recovery has begun. More than an expansion of the market, however, it reflects the relative weakness of the American dollar, the currency in which most art deals are transacted. Collectors from countries with stronger currencies have been finding dollar prices cheap. The middle market is still fairly weak. It is not unusual for up to half the lots on offer at a Christie's or Sotheby's sale to be left unsold. Dealers, as opposed to auctioneers, are still finding it hard to make a living and seldom buy for stock. The auctioneers have tried to replace them by encouraging private people to buy directly at auction—and more of them are doing this. But private buying is unpredictable and cannot underpin the market in the way dealer buying used to. Private individuals buy what they want they don't bid on everything that is going cheap. Overall, the nature of the market is changing. In the 1980s art was bought as a speculation: buy in April, sell for double the price in September. This mentality vanished with the 1990 collapse, but the very rich and their financial advisors still take the view that it is sensible to keep a percentage of your investment portfolio in art. It is this kind of money that creates the fancy prices at the top end of the market. Geographically, the present recovery has been led by North America. Normally a major recession, such as was experienced in the United States, results in a shift of taste. But the Americans liked Impressionist and classic modern pictures best before the market collapse and that is what they have been coming back to. It is currently the strongest sector of the picture market. Contemporary and Old Master markets are still struggling and there are few buyers for Victorian pictures, apart from Lloyd Webber. Besides Europe and America, however, there is now a growing market in the East. Indeed, the East has become the great hope of hard-pressed dealers over the last three years—they have been aiming to find new buyers in Japan, Korea, Singapore, Taiwan, Hong Kong and China. There are more rich connoisseurs in Japan than anywhere else but they have not been in a buying mood. Japanese speculators lost huge amounts of money in the 1990s crash and there are few collectors who dare to buy any works of art today. The market in Chinese ceramics, works of art, jade jewelry and old and modern brush paintings is now dominated worldwide by wealth
A.
The American dollar has become weaker against some major currencies.
B.
The very rich wish to put part of their investment in art.
C.
The very rich have regained their confidence.
D.
Dealers buying is growing strong.
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【单选题】开阔地的主要电波传播方式主要是?()
A.
散射和绕射
B.
直射和散射
C.
直射和反射
D.
反射和绕射
【简答题】扦插的基质应满足的条件有哪些?
【多选题】如图所示,长直导线通以方向向上的恒定电流 i ,矩形金属线圈 abcd 与导线共面,线圈的长是宽的 2 倍,第一次将线圈由静止从位置 I 平移到位置 II 停下,第二次将线圈由静止从位置 I 绕过 d 点垂直纸面的轴线旋转 90 0 到位置 III 停下,两次变换位置的过程所用的时间相同,以下说法正确的是 ( )
A.
两次线圈所产生的平均感应电动势相等
B.
两次线圈所产生的平均感应电动势不相等
C.
两次通过线圈导线横截面积的电量相等
D.
两次通过线圈导线横截面积的电量不相等
【单选题】A0 图纸面积是 A3 图纸面积的几倍?
A.
2
B.
4
C.
6
D.
8
【单选题】关于宿主控制的限制修饰现象的本质,下列描述中只有( )不太恰当。
A.
由作用于同一DNA序列的两种酶构成
B.
这一系统中的修饰酶主要是通过甲基化作用对DNA进行修饰
C.
这一系统中的核酸酶都限制性内切核酸酶
D.
不同的宿主系统具有不同的限制-修饰系统
【单选题】偏食、挑食、拒食新鲜蔬菜或水果,长期服用抗菌素、抗癫痫药,长期腹泻容易造成()缺乏。
A.
维生素B1
B.
维生素K
C.
叶酸
D.
维生素E
【单选题】加拿大作业活动行为评估有利于治疗师的作业治疗,与其他评估方式不同的是哪项
A.
将患者活动障碍与满意度联系起来
B.
治疗师对患者进行全方面的评估
C.
主要针对日常生活活动
D.
评估了患者治疗的全过程
E.
由治疗师进行的综合分析
【单选题】下列关于图纸描述错误的是( ) (a).A0号图纸的面积为1平方米。 (b).图纸的长边通常为短边的2倍。 (c).图纸中的标题栏通常为通栏。 (d).图纸幅面有立式和横式两种。
A.
(a)
B.
(b)
C.
(c)
D.
(d)
【多选题】关于组成油脂的脂肪酸的说法正确的是( )。
A.
主要为含一、二十个碳的偶数直链脂肪酸
B.
天然存在的不饱和脂肪酸中的双键大多为稳定的反式构型
C.
多不饱和(或多烯)脂肪酸中的多个双键为非共轭结构
D.
亚油酸、亚麻酸、花生四烯酸在人体内不能合成或者合成不足,称为必需脂肪酸
【多选题】天然脂肪酸的结构特点是:
A.
碳链长度通常为偶数。
B.
不饱和键的位置通常位于9-10号碳原子之间。
C.
双键的构型通常为反式。
D.
多不饱和脂肪酸的双键不是共轭的。
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