x
﹣1
0
1
3
y
5
①ac＜0；
②当x＞1时，y的值随x值的增大而减小；
③x=3是方程ax2+（b﹣1）x+c=0的一个根；
④当﹣1＜x＜3时，ax2+（b﹣1）x+c＞0．
上述结论中正确的个数是（ ）
曹刿"下视其辙，登轼而望之"的原因是：____。
Location
It lies in ____ Hubei Province.
Area
It's ____ square kilometers in size.
____
About 3,000,000.
____ of interest
You can visit Mount Dongfang, National Mining Park and the Ci Lake.
Things to eat
Taizi tofu is really ____
