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【简答题】
在组合投资理论中，有效证券组合是指（ ）。
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反馈参考答案：
举一反三
【单选题】Li Na started her sporting life ( ) a badminton racket in her hand at age six.
A.
in
B.
with
C.
on
D.
at
【简答题】铸铁是碳的质量分数____并含有硅、锰、硫、磷等元素的多元铁基合金。铸铁与钢相比,虽然____、____、____较低,但却具有优良的____性、____性、____性,,____也较低,因此在工业上得到了广泛的应用。
【简答题】原始凭证是登记会计账簿的直接依据。 （ ）
【简答题】原始凭证是登记会计账簿的直接依据．( )
【单选题】挑出句中的表语:Soon they all became interested in the subject.
A.
became
B.
interested
C.
subject
D.
they
【单选题】李娜是手握羽毛球拍开始她的运动生涯的,那年她6岁。
A.
Li Na started her sporting life at age six.
B.
Li Na starts her sporting life on age six.
C.
Li Na starts her sporting life with a badminton racket in her hand at age six.
D.
Li Na started her sporting life with a badminton racket in her hand at age six.
【单选题】Li Na ____________ her husband’s significant contribution in her development on the WTA Tour.
A.
thanked
B.
acknowledged
C.
owed
D.
accumulated
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