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The famous teacher pointed out the answers from 10 to 1 1 page in Tianjin junior high school mathematics! Ready to use!
a,B,C,B,C,B,B,B,B,B,B,B,B,C,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B,B

Three. 1. Error 2. Error 3. Right 4. 1.6 3 and 2/ 1.52.5/4

It's PEP, right In the sixth grade.