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【简答题】
在等比数列{a n }中,(a 1 a n ) 2 -a 2 a 4 a n-1 a n-3 =______.
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参考答案:
举一反三
【单选题】Miss Wu has taught in this school ______.
A.
for ten years
B.
ten years ago
C.
since ten years
D.
for ten years ago
【单选题】下列关于会计要素的表述中,不正确的是
A.
会计要读是对会计对象的基本分类
B.
收入、成本和利润构成利润表的基本框架
C.
资产、负债和所有者权益称为静态会计要素
D.
会计要素是对会计核算对象的具体化
【单选题】Miss Wu has taught English ______ she came here.
A.
since
B.
as
C.
when
D.
for
【单选题】比较下列滴定,哪种类型滴定突跃最大 ( )
A.
0.10 mol.dm-3NaOH滴定0.10 mol.dm-3HCl
B.
1.0 mol.dm-3NaOH滴定1.0 mol.dm-3HCl
C.
0.10 mol.dm-3NaOH滴定0.10 mol.dm-3HAc
D.
0.10 mol.dm-3NaOH滴定0.10 mol.dm-3HCOOH
【简答题】The concentration of H 2 S in a saturated aqueous solution at room temperature is approximately 0.10mol·L -1 . Calculated c(H 3 O + ),c(HS - ),and c(S 2- )in the solution.
【单选题】Miss Jones once _____ music at Bardon School for years and now is an actress. [     ]
A.
has taught
B.
taught
C.
had taught
D.
teaches
【判断题】风险决策方法其实也是一种非确定型决策方法。
A.
正确
B.
错误
【单选题】下列关于会计要素的表述,不正确的是()。
A.
会计要素是对会计对象的基本分类
B.
资产、负债和所有者权益反映企业的财务状况
C.
资产、负债和所有者权益称为静态会计要素
D.
收入、成本和利润三个要素,在利润表中列示
【单选题】Miss Gao _____ this school since 1996. [     ]
A.
has come to
B.
came to
C.
has taught
D.
has been in
【单选题】Miss Wu has a _________.
A.
a daughter
B.
a son
C.
a daughter and a son
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