二星Galaxy Grand手机今天终于正式发表了，这款产品采用了5英寸800x480WVGA屏幕、双核1．2GHz处理器（具体型号未知）、1GB RAM、8GB ROM......

The IR spectrum and 11B and 27Al MAS NMR spectra of Al18B4O33 are presented and discussed in relation to the possible ex......