1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       .

2编号:22255题型:单选题测试正确率:57.89%

3编号:22254题型:单选题测试正确率:58.75%

4编号:22253题型:单选题测试正确率:58.3%

5编号:22252题型:单选题测试正确率:53.66%

6编号:22251题型:单选题测试正确率:59.35%

7编号:22250题型:单选题测试正确率:70.59%

8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()

9编号:22245题型:单选题测试正确率:41.67%

10编号:22244题型:单选题测试正确率:28.93%