1编号:22458题型:单选题测试正确率:72.81%

2编号:22457题型:单选题测试正确率:71.9%

化简6x2+9x-1-(x-2x2-1)+2的结果为()

3编号:22410题型:单选题测试正确率:54.79%

4编号:22409题型:单选题测试正确率:59.98%

5编号:22408题型:单选题测试正确率:50.37%

6编号:22407题型:单选题测试正确率:71.35%

设n为正整数,则的结果为( )

7编号:22406题型:单选题测试正确率:68.87%

下列计算正确的是()

8编号:22405题型:单选题测试正确率:69.5%

9编号:22404题型:单选题测试正确率:67.11%

10编号:22403题型:单选题测试正确率:68.9%