苔藓植物吸收水分和无机盐的结构是它的根.
—Hello, may I speak to Mr Green , please?—Sorry. He ________ a meeting. Can you call him later?
电影院的墙壁往往做成凹凸不平的,这是为了( )
(Ⅰ)求角C的大小;
(Ⅱ)设y=﹣4 3 sin2 A2 +2sin(C﹣B),求y的最大值并判断当y取得最大值时△ABC的形状.
儒家经典强调:“上好礼,则民莫敢不敬;上好义,则民莫敢不服;上好信,则民莫敢不用情。”这段话体现的是( )