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单项选择题





A．<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/aeebd6c49f8b4ff3a7fff01a765febd3/b19fbe5a-0698-43f4-85f7-455676118f34.jpg">
B．<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/aeebd6c49f8b4ff3a7fff01a765febd3/2e7d2f3e-99dc-4d33-a40c-b0ffe6878eff.jpg">
C．<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/aeebd6c49f8b4ff3a7fff01a765febd3/dfd9962e-c70e-485a-8a25-541a2634bab4.jpg">
D．<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2014/8/27/aeebd6c49f8b4ff3a7fff01a765febd3/89cd64a0-6c4a-4403-9c67-cdc10d091fd6.jpg">

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单项选择题A．<br ><img src= {$uploaddir} 92dbb032-09c5-422d-bd0c-b5177932a98a.jpg >B．0C．<br ><img src= {$uploaddir} 38c26429-7afd-46f1-8b8b-436738b18cdb.jpg >D．<br ><img src= {$uploaddir} 53c311f0-7a31-420d-8d6b-0e0f60729271.jpg >

A．<br /><img src="{$uploaddir}/92dbb032-09c5-422d-bd0c-b5177932a98a.jpg">
B．0
C．<br /><img src="{$uploaddir}/38c26429-7afd-46f1-8b8b-436738b18cdb.jpg">
D．<br /><img src="{$uploaddir}/53c311f0-7a31-420d-8d6b-0e0f60729271.jpg">

单项选择题A．<br ><img src= {$uploaddir} a7857777-74e8-41cd-b477-fe3417670841.jpg >B．<br ><img src= {$uploaddir} f68468f7-d5f1-4515-a2ba-5efda1056100.jpg >C．<br ><img src= {$uploaddir} b5d1e5d8-5266-49db-ab55-3f5e890efbe6.jpg >D．0

A．<br /><img src="{$uploaddir}/a7857777-74e8-41cd-b477-fe3417670841.jpg">
B．<br /><img src="{$uploaddir}/f68468f7-d5f1-4515-a2ba-5efda1056100.jpg">
C．<br /><img src="{$uploaddir}/b5d1e5d8-5266-49db-ab55-3f5e890efbe6.jpg">
D．0

单项选择题A．<br ><img src= {$uploaddir} d98972e6-cd5c-4a79-b4a7-669a2e2de6a8.jpg >B．3C．<br ><img src= {$uploaddir} cde43d4f-b702-485d-8fa5-1e1167fbfe30.jpg >D．不存在

A．<br /><img src="{$uploaddir}/d98972e6-cd5c-4a79-b4a7-669a2e2de6a8.jpg">
B．3
C．<br /><img src="{$uploaddir}/cde43d4f-b702-485d-8fa5-1e1167fbfe30.jpg">
D．不存在

单项选择题函数f(x)=x3=3x2的拐点是（ ）．

A．(0，0)和(2，-4)
B．(2，-4)
C．(0，0)
D．(1，-2)

单项选择题下列函数极限运算不正确的是( )．

A．<br /><img src="{$uploaddir}/d0c35373-845b-4349-9310-77e126aeec46.jpg">
B．<br /><img src="{$uploaddir}/441a911d-7caf-4cfd-a93e-a2c14057805b.jpg">
C．<br /><img src="{$uploaddir}/02772256-7b76-4368-83e1-9eb35862804f.jpg">
D．<br /><img src="{$uploaddir}/3cc5b787-afdf-4bcb-88bc-1df9545ec2f7.jpg">