SOS .math problem 直线y＝-x,直线y＝x+2与x轴围成图形的周长是___（结果保留根号）

SOS .math problem 直线y＝-x,直线y＝x+2与x轴围成图形的周长是___（结果保留根号） ( )the math problem( 0. advanced math problem sat math problem 一道 sat math problem work on the math problem是什么意思 Can you __ __ this math problem? WORKING ON MATH PROBLEM 中的 WORK为什么要加ING Can you help me?I have trouble_______out the math problem. Would you help me ___ this math problem? the clever girl workde out the math problem (esay) We both ofen a__ with each other on math problem. can you work out this math problem ( )(correct)? he had a problem with math this week同义句 Look!Peter____ ____ ____（解答）a math problem Look,Jim is working _____ a math problem. it`s easy to ____out this math problem The maths problem is too difficult.math为什么加s