题目

阅读理解Shopping is not as simpleas you think! There are all sorts of tricks at play each time we reach out forthat particular brand (品牌) of product on the shelf.Coloring, for example,varies according to what the producers are trying to sell. Health foods arepackaged in greens, yellows or browns because we think of these as healthycolors. Ice cream packets are often blue and expensive goods, like chocolates,are gold and silver.When some kind of pain killer was brought out recently, researchers found that the colors turned the customers off because they made the product look weak and in在长方形AA1B1B中，AB=2AA1，C，C1分别AB，A1B1是的中点（如图1）．将此长方形沿CC1对折，使平面AA1C1C⊥平面CC1B1B（如图2），已知D，E分别是A1B1，CC1的中点．（1）求证：C1D∥平面A1BE；（2）求证：平面A1BE⊥平面AA1B1B．