Silicosis is occupational disease for certain, is coal silicon ill?矽肺肯定是职业病, 煤矽病?Attention must be paid on the synergic effect of smoking and silicosis in cancer complication.吸烟和矽肺同时存在时,有必要注意协同作用.Paper describes the thre...
The collapsar model of gamma - ray bursts.γ射线爆发的黑洞模型.If gamma particles are present, potential differences of several thousand volts can be generated.如果存在γ粒子, 可能产生几千伏的电位差.Unimmunized contacts, especially infants, should ...