1编号:2181题型:单选题测试正确率:35.33%

2编号:2180题型:单选题测试正确率:30.26%

3编号:2179题型:单选题测试正确率:41.94%

4编号:2177题型:单选题测试正确率:71.58%

5编号:2054题型:单选题测试正确率:66.37%

6编号:2052题型:单选题测试正确率:49.05%

7编号:2051题型:单选题测试正确率:56.83%

8编号:2050题型:单选题测试正确率:54.92%

9编号:577题型:单选题测试正确率:40.0%

数A、B,当 时,规定A◎B=3×A+2×B;当A<B时,规定A◎B=2×A+3×B,若x◎2=7,求x=(      )

10编号:499题型:单选题测试正确率:42.74%

计算:(     )

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