球车，从选购开始

一轮高尔夫球大约4小时，其中近一半的时间在球场上度过。国外许多球场没有球车。而在中国球场，球车是基本配置。所以，球车是高尔夫球场管理的一个重要元素。就与之有关的高尔夫球场管理面临的许多挑战，本刊邀请了业内专家、来自美国的Keith Andrews发表对这些问题的看法，将分期连载在本刊上。同时，《中国高尔夫管理》作为一个开放的平台，欢迎更多业界同仁就相关话题发表意见，进行讨论。[编者按]     

Children's early child care and their mothers' later involvement with schools

Theory and policy highlight the role of child care in preparing children for the transition into school. Approaching this issue in a different way, this study investigated whether children's care experiences before this transition promoted their mothers' school involvement after it, with the hypothesized mechanism for this link being the cultivation of children's social and academic skills. Analyses of 1,352 children (1 month-6 years) and parents in the NICHD Study of Early Child Care and Youth Development revealed that mothers were more involved at their children's schools when children had prior histories of high-quality nonparental care. This pattern, which was fairly stable across levels of maternal education and employment, was mediated by children's academic skills and home environments.     

速度滑冰的蹬冰力

在速度滑冰中,成绩与运动员每次蹬冰所产生的功量和蹬冰的频率乘积有关。运动员每次蹬冰所做的功取决于与滑行方向垂直的蹬冰力的分力。通过对三个受过训练的速滑运动员测试,测定他们在不同速度时的蹬冰力。结果表明;在不同的速度时,最大的蹬冰力与平均蹬冰力并不改变。而且速度越大,蹬冰时间越短。由此可见,速滑运动员并不是通过改变蹬冰力的大小,而是通过改变蹬冰时间来调节速度。蹬冰力——时间曲线的图形形状取决于蹬冰技术,并且直道滑行与弯道滑行的曲线形状也有区别。速度滑冰的成绩与运动员用于克服空气和冰面摩擦阻力的外功P。密切相关(Ingen Schenau)。外功P。等于每次蹬冰     

Two Writing Activities for Extensive Reading

当您在费思细量如何提高这群淘气孩子的泛读能力时,这两种活动是否给你一些豁然开朗的提示呢?-- One magical thing will happen that the students gain more benefit through these activities.     

绿色的田野

~~绿色的田野@T.吉尔基森!美国 @R.德尔!美国 @F.米勒 @陶桂年~~     

《公民韦尔斯》——又一部韦尔斯传发表

人们仍然怀念已故的奥森·韦尔斯。他曾是一位活跃于舞台、银幕和广播电台的明星,也是一位无论是他的失败或成功都受到人们关注的自视颇高的天才。在漫长而渐渐衰微的艺术生涯中,他表演过各种各样的节目:从古典作品到商业广告。老一代人依然记得他演出过有争议的新编莎士比亚戏剧,也记得他演播的广播剧《星际战争》,这部广播剧曾使千千万万听众相信火星人曾经入侵新泽西州。