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【简答题】
Read the following advertisement and write a letter of application of 120 words. Do not write your address or name.WANTED FAMILY TO SPEND A MONTH ON A DESERT ISLAND IPK Magazines is looking for a family who would be willing to spend a whole month by themselves on a desert island. Write and tell us Why you think your family would be suitable What qualities you think would be particularly useful Any special experience anyone in your family has Contact Dave O'Hare
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【单选题】二次函数y=ax 2 +bx+c的图象如图所示，则下列关系式不正确的是 [ ]
A.
a<0< /div>
B.
abc>0
C.
a+b+c>0
D.
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【简答题】二次函数y=ax 2 十bx+c的图象如图所示，则下列关系式不正确的是 [ ] A．a0 C.a+b+c>0 D.b 2 -4ac>0