1.单选题- (共5题)
的坐标是(2，1)，那么点P关于原点的对称点
的坐标是( ).2.选择题- (共2题)
In China, there're many different kinds of food. Some of them are very popular. The real Chinese food is dumplings. Now let's talk about them, OK?
Everyone in China likes dumplings very much, and there are many different kinds of dumplings. Some have meat and vegetables in them, others have sugar, eggs and so on. I like dumplings with vegetables and pork better than any other kind.
Usually people make dumplings at home. If you have no time to make them, you can buy them from any supermarket. Then you take them home and eat them with vinegar.
The Spring Festival is very important in China. When it comes, we make dumplings, usually we put a coin(硬币) in a dumpling. If one eats the dumpling with the coin in it, he or she will be lucky in the year.
In the old days, people couldn't often eat dumplings, because they were very poor. Now our country is becoming stronger and stronger, and our people are richer and richer. We can eat them very often.
Now tell me, do you like dumplings?
Welcome to China, and we'll invite you to eat the real Chinese food —dumplings.
3.填空题- (共3题)
，
是关于x的一元二次方程x2+（2m+3）x+m2=0的两个不相等的实数根，且满足
=﹣1，则m的值是____．4.解答题- (共7题)
下降到12月份的11340元/.(1)求11、12两月份平均每月降价的百分率是多少？
(2)如果房价继续回落，按此降价的百分率，你预测到今年2月份该市的商品房成交均价是否会跌破10000元/
？请说明理由
平面直角坐标系中，抛物线y=ax2+4x+c与y轴交于点A（0，5），与x轴交于点E，B，点B坐标为（5，0）．（1）求二次函数解析式及顶点坐标；
（2）过点A作AC平行于x轴，交抛物线于点C，点P为抛物线上的一点（点P在AC上方），作PD平行于y轴交AB于点D，问当点P在何位置时，四边形APCD的面积最大？并求出最大面积．
（1）求出利润S（元）与销售单价x（元）之间的关系式（利润=销售额﹣成本）；
（2）当销售单价定为多少时，该公司每天获取的利润最大？最大利润是多少元？
（1）判断BE与⊙O的位置关系并说明理由；
（2）若⊙O的半径为4，BE=3，求AB的长．
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【1】题量占比
单选题:(5道)
选择题:(2道)
填空题:(3道)
解答题:(7道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：9
7星难题：0
8星难题：3
9星难题：3