李师傅要完成630个零件,前8天完成了168个,照这样计算,他31天能不能完成这些零件?
630÷(168÷8)
=630÷21
=30(天);
30<31,
答:他31天能完成这些零件.
假如你是李华,最近对你校的高三学生的体育活动现状进行了调查。请根据下列图示,用英语写一篇报告,并简要陈述你的观点。
注意: 1.词数:100字左右
2.文章的开头已给出,不计入总词数。
3.生词提示:设施facility
Recently I made a survey of Senior 3 students on physical training.
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用金相法测定脱碳层时有哪些要求?