A:0m/
B:2m/
C:4m/
D:8m/
(Ⅰ)f(x)≥1﹣2x+3x2;
(Ⅱ) 23 <f(x)≤ 174 .
三角形具有____性,平行四边形不具备____。
阅读材料,然后从各小题所给的四个选项中选出一个最佳答案。
Found:
Is this your book? Please call John at 495-3456.
Lost:
My school ID card.
My name is Mike.
Please call 487-2349
Found: Is that your black schoolbag? Please call Mary. Phone#476-5939
Found: A set of keys. Please call Lily at 498-2456
Lost: My pencil case.
Blue and white, call Tom at 456-8700.
Found: A cat. Black and White. At the school gate.
Call: 412-9856.