Silicon nanowires(SiNWs) encapsulated with graphene-like carbon sheath(GS) having a void space in between(SiNW@V@GS) are demonstrated for the improved electroch
比较等级是初中生必须掌握的重要语法项目之一,但不少同学在使用的时候经常出错,归纳起来大致有七类易错的情况: 一、比较对象不一致 在使用比较级时,比较的双方必须是同一类人或物,非同类的事物是不能进行比较的。例如: 他的钢笔比我的便宜。 误:His pen is cheaper than I. 正:His pen is cheaper than mine. 析:his pen只能与my p
Mesoporous silica has been widely explored for biomedical applications due to its unique structure and good biocompatibility. In particular it exhibits superior