Reading ability is one of key components for second language learners to study a second language. With the respect of th......

【Abstract】he demographic shows that the aging population in China is increasing and they are also living longer than b......

目的 探讨广泛性睫状体脱离分段缝合手术的效果。方法 对12例（12眼）外伤性睫状体脱离，睫状体脱离范围〉180。术中在睫状体脱离区域做......

机械行业逐步成为工业中的主流行业,应用非常广泛。机械学原理、机械设计、机械制造,成为三位一体的机械特色,被更多的领域所熟知......