— Do you have bags in your store?
— Sorry, we don't __________bags.
A:take
B:sell
C:need
D:get
日常生活中,下列数据接近实际的是
Jerry's parents ____ his laptop because he was too crazy about the computer game.
(Ⅰ)若E为棱PB的中点,求证:CE∥平面PAD;
(Ⅱ)求二面角A﹣PB﹣C的平面角的余弦值.