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【简答题】
已知关于x的不等式（a 2 -4）x 2 +（a+2）x-1≥0的是空集，求实数a的取值范围．
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皮皮学刷刷变学霸
举一反三
【单选题】Why are the clothes so inexpensive at the shop?
A.
The shop is a factory outlet.
B.
The shop is going to close.
C.
The customer is good at bargaining.
【单选题】Why are the clothes so inexprensive at the shop?
A.
The shop is a factory outlet.
B.
The shop is going to close.
C.
The customer is good at bargaining.
D.
空缺
【简答题】A．After she designed the clothes women wanted. B．When the owner of the shop died. C．When the owner of the shop retired. D．Soon after she worked in the shop.
【单选题】The shop —-clothes is —the right side —-the street
A.
Of,at,beside
B.
For,on,at
C.
For,on,of
D.
Of,in,of
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