1.单选题- (共8题)
| A．200（1+a）2=148 | B．200（1-a）2=148 | C．200（1-2a）=148 | D．148（1+a）2=200 |
通过配方后所得的方程是（ ）
有一根为0
的两根互为相反数
的两根互为相反数
无实数根
有两个不相等的实数根，则m的取值范围是
的解是
有两个不相等的实数根，那么k的取值范围是（）
，下列配方正确的是（ ）
2.选择题- (共3题)
2015年夏季，我国南涝北旱形势严峻，各地政府都要求想尽一切办法，关键是要抓好民生工作，重点保证群众的生命财产安全。这体现了（ ）
①科学的抗灾措施可以改造自然规律，战胜自然灾害
②抗击灾害要坚持充分发挥主观能动性，做到以人为本
③科学抗灾要抓住重点、集中主要力量解决主要矛盾
④看待自然灾害既要全面，又要分清主流和支流
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9题)
，例如：5⊗3，因为5＞3，所以5⊗3=5×3﹣32=6．若x1，x2是一元二次方程x2﹣6x+8=0的两个根，则x1⊗x2=________．
是一元二次方程；
+（m﹣3）x﹣1=0是一元二次方程．
的方程4kx2+12x-5=0有实数根,则
经过配方后，得
，那么a=________.
，
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)
解方程x4﹣5x2+4＝0，这是一个一元四次方程，根据该方程的特点，它的解法通常是：
设x2＝y，那么x4＝y2，于是原方程可变为y2﹣5y+4＝0，解得y1＝1，y2＝4．
当y＝1时，x2＝1，∴x＝±1；
当y＝4时，x2＝4，∴x＝±2；
∴原方程有四个根：x1＝1，x2＝﹣1，x3＝2，x4＝﹣2．
请参照例题，解方程 （x2+x）2﹣4（x2+x）﹣12＝0．
是关于x的一元二次方程
的两个不相等的实数根，且满足
，求m的值.
）=0(1)求证：无论k取何值，这个方程总有实数根；
(2)若等腰三角形ABC的一边长a=4，另两边b、c恰好是这个方程的两个根，求△ABC的周长．
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【1】题量占比
单选题:(8道)
选择题:(3道)
填空题:(9道)
解答题:(7道)
-
【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：11
7星难题：0
8星难题：6
9星难题：7