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问题 单项选择题

关于翼静脉丛广泛交通描述哪项是正确的（）

A.向后外经上颌静脉汇入下颌后静脉

B.向前经面深静脉汇入面静脉

C.向上经卵圆孔网和破裂孔导血管等与海绵窦交通

D.收集口腔颌面及眼的静脉血

E.A+B+C+D

答案

参考答案：E

单项选择题

Helen Alba and Kobin Lubis have deferring views on the future performance of U-Cite. Consequently, Alba has taken a short position while Lubis has purchased the stock on margin. The relevant details are as follows: Market price per share: $42 Number of shares purchased: 1000 Holding period: 1 year Ending share price: $50 Initial margin requirement: 45% Maintenance margin: 30% Transaction and borrowing cost: $0 Alba and Lubis will receive margin calls at a stock price of: Alba Lubis()①A. $37.66 $53.45 ②B. $46.85 $53.45 ③C. $46.85 $33.00

A. ①

B. ②

C. ③
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单项选择题

在数据库设计器中，建立两个表之问的一对多联系是通过以下索引实现的_____。

A．“一方”表的主索引或候选索引，“多方”表的普通索引

B．“一方”表的主索引，“多方”表的普通索引或候选索引

C．“一方”表的普通索引，“多方”表的主索引或候选索引

D．“一方”表的普通索引，“多方”表的候选索引或普通索引
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