The complexMn £¨C £±£3 H £? N£2OBr £(c)£2£¨C£μH£μN£(c)2·3C5H5 N has been synthesized and characterized by X-Ray diffraction,IR and variable temperature(?10t
Nowadays, English is an important way to communicate in modern society. The status of English teaching has been rising rapidly. But the English teaching of prim