1编号:3655题型:单选题测试正确率:41.26%

已知二次函数y=ax2+bx+c(a,b,c为常数,a≠0)的图象如图所示,有下列结论:①abc>0,②b2-4ac<0,③a-b+c>0,④4a-2b+c<0,其中正确结论的个数是(    

2编号:3654题型:单选题测试正确率:68.32%

已知关于x、y的方程组,解是的值为()

3编号:3653题型:单选题测试正确率:53.47%

若方程组的解相同,则a,b值为()

4编号:3652题型:单选题测试正确率:61.39%

若方程组有无数组解,则k与m的值分别为()

5编号:3651题型:单选题测试正确率:59.41%

用加减法解方程组,较方便的是()

6编号:3649题型:单选题测试正确率:85.92%

—The pet cat in your hand is very nice. Is it______?
—Yes, but I’ll give it to my friend Lucy as ______ birthday present.

7编号:3648题型:单选题测试正确率:88.51%

Harriet is lost and her parents are really ______her.

8编号:3647题型:单选题测试正确率:79.1%

—How far is your cousin’s home from here?
—It’s about two______ drive.

9编号:3646题型:单选题测试正确率:75.73%

For my homework, I have to write a(an)______about the wonders of the world.

10编号:3644题型:单选题测试正确率:79.03%

已知:如图,A点坐标(-1,0),B点坐标(0,1).请在y轴上找一点P,使△APB为等腰三角形,写出P的坐标(  )