th Grade Civil Servant 七级公务员
th-grade education 第八级教育
th grade curriculum 年级课程
th Grade Physics 初二物理知识
th Grade Rep 端木家倩
th Grade Math 初中一年级数学
th-grade highway 四级公路
th Grade Academy 九年级学校
th Grade Friendzy 年级的朋友
The results showed : ( 1 ) peer group in 4-5 th graders was still in the initial formation stage, its density and centralization kept increasing with grade;
结果表明：（1）同伴团体在小学四、五年级尚处于初步形成期，其密度和中心势均随年级升高而提高；
The experimental studies demonstrated that reasonable abrasive and hardness grade of wheel, grinding parameter, high efficiency grinding fluid and CBN wheel will avoid effectively th...
试验研究表明，合理的砂轮磨料和硬度等级、合理的磨削用量、高效磨削液和CBN砂轮将有效地避免钛合金的磨削烧伤和磨削裂纹。
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