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最佳答案:1.设书包单价X元,则随身听单价8X-30元X+8X-30=510X=60答:书包60元,随身听450元2.设:甲每小时做X个零件,则乙每小时做X-6个零件.9
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最佳答案:He's fond of music,so he listens to MP3 all day long.Last Thursday they took a l
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最佳答案:In Western cultures,maintaing eye contact in conversations is necessary.As a mat
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最佳答案:1.I wrote him a letter last month2.He has been staying abroad for 6 months.3.He