资产之间的相关系数发生变化时,投资组合的收益率都不会低于所有单个资产中的最低收益率,投资组合的风险可能会高于所有单个资产中的最高风险。()
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带传动装置外面应加()。
A. 润滑油脂
B. 润滑油
C. 张紧装置
D. 防护罩
SOX is an alternative(1)for XML.It is useful for reading and creating XML content in a(2).editor.It is then easily transformed into proper XML.SOX was created because developers can spend a great deal oftime with raw XML.For many ofus,thepopular XML(3)have not reached a point where their tree views,tables and forms can completely substitute for the underlying(4)languagE.This is not surprising when one considers that developers still use a text view,albeit enhanced,for editing other languages such as Java)SOX uses(5)to represent the structure of an XML document,which eliminates the need for closing tags and a number of quoting devices.The result is surprisingly clear.空白(1)处应选择()
A. semantic
B. pragmatics
C. syntax
D. grammar
王某在吃饭时丢失瑞士名表罗西尼一块,餐厅人员拾得后交给公安部门。王某未在规定期限内前去认领,公安部门按照有关规定交寄售商店出售。孙某从该商店买得该手表,将手表送给女友林某作生日礼物。手表在林某第二天乘公交车时被偷去,小偷下车后即以100元的低价卖给郑某。该手表的所有权属于()。
A. 王某
B. 孙某
C. 林某
D. 郑某
女性,30岁,经前双乳胀痛,经期即消,检查双乳大小不等的结节状肿物间有索条,质韧,边界不清,可推动,无压痛初步考虑是()
A. 乳腺癌
B. 乳腺管内乳头状瘤
C. 乳腺囊性增生病
D. 乳腺纤维瘤
E. 乳腺炎