Some people are able to remain sexually abstinent and thus escape all risks .一些人在性的方面能够坚持禁欲并且由此规避所有的风险。Indeed, very many females and males are neither abstinent nor sexually exclusive.真实的情形是, 非常多的男男女女既不禁欲也不性专一.During tre...
资本家利用劳工的剩余价值发家致富.Capitalists use laborers'surplus value to make a fortune.劳工的工资很低廉, 但是水 、 电和就学则是免费.Wages were low, but water, electricity and schooling were free.雇主愿减少劳工的人事流动.Employers wish to reduce labor turnover....
The structure, the principle of work, bauxite floatation of BF - L floatation machine were presented.本文介绍了BF -L 型浮选机的结构特点, 工作原理及铝土矿选矿的适应性研究.The seven leading bauxite exporters formed the International Bauxite Association...