皮皮学,免费搜题
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【单选题】
听力原文:M: Can I help you? W: Yes, I'm looking for the cashier's. Q: What is the woman going to do? (24)
A.
To buy things.
B.
To pay money.
C.
To borrow a book.
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【单选题】堆垛占的土地面积可用( )来计算
A.
占地面积 = (总件数 / 可堆层数) * 每件商品底面积
B.
占用面积 = (可堆层数 / 总件数) * 每件商品底面积
C.
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D.
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A.
若y=3,则y′=0
B.
若y= 1 x ,则y′=- 1 2 x
C.
若y=- x ,则y′=- 1 2 x
D.
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A.
若y 1 =y 2 ,则x 1 =x 2
B.
若x 1 =-x 2 ,则y 1 =-y 2
C.
若0<x 1 <x 2 ,则y 1 >y 2
D.
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A.
若x 2 =1,则x=1
B.
若x=y,则 x = y
C.
若 1 x = 1 y ,则x=y
D.
若x<y,则x 2 <y 2
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【单选题】下列命题是真命题的为(  )
A.
若 1 x = 1 y ,则x=y
B.
若x 2 =1,则x=1
C.
若x=y,则 x = y
D.
若x<y,则x 2 <y 2
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