1编号:22257题型:单选题测试正确率:32.37%

2编号:22256题型:单选题测试正确率:22.54%

已知a<b,则化简二次根式的正确结果是       .

3编号:22255题型:单选题测试正确率:57.89%

4编号:22254题型:单选题测试正确率:58.75%

5编号:22253题型:单选题测试正确率:58.3%

6编号:22252题型:单选题测试正确率:53.66%

7编号:22251题型:单选题测试正确率:59.35%

8编号:22250题型:单选题测试正确率:70.59%

9编号:22246题型:单选题测试正确率:25.0%

一个数的平方根是和8a-4b+20,则这个数为()

10编号:22245题型:单选题测试正确率:41.67%