设NA为阿伏加德罗常数的值.下列说法正确的是( )
“九州缩地凭挥翰,四海披图当泛槎(木筏)”。这是近代诗人张维屏对一部著述的称赞。这部著作是
Sanya is ____ in winter. It's ____ than many other cities in China. (warm)