试题与答案

A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不

题型:问答题

题目:

A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.

x2+2x+a=0和2x2+ax+1=0有公共根.
(1)a=-2; (2)a=-3.

答案:

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benefits or time off. Whatever it is that you count as your basic requirements, make sure that you do not accept a job without it. Your requirements might be difficult to get, but you have all the rights to try and a chieve them.
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     If you are looking for the right career, another thing that you can do to make sure that you get the right kind of employment is to advertise yourself. When you do nothing to push yourself forward, you will be the one
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