【简答题】如图,AB是⊙O的直径,弦CD⊥AB,垂足为E,如果AB=10,CD=8,那么sin∠OCE= .
【简答题】如图,AB是⊙O的直径,弦CD⊥AB,垂足为E,如果AB=26,CD=24,那么sin∠OCE=
【单选题】Bids will be taken and opened for ______ of contract at the offices of Messrs. Albright,Jenkins & Co.,the ship's Agents,located in this city,on August 19,2007,at 9: 00 AM.
【简答题】如图,⊙O中,直径AB⊥弦CD于E,若AB=26,CD=24,则tan∠OCE= .
【判断题】To Messrs. China Ocean Shipping Agency.
【单选题】若 x 是 int 型变量,以下程序段的输出结果是 for(x=3;x<6;x++) printf((x%2)?(“**%d”):(“##%d\n”),x);
【多选题】典型的消费者购买决策过程一般由( )等几个阶段所组成。