题目

如图所示,一束宽度为d的平行光沿水平方向传播,经过不透光的挡板后照射到竖直墙面上,过挡板上边缘的水平延长线与竖直墙面相交于O点,下列说法正确的是() A . 由于光的衍射,可能会进入到O点下方的墙上 B . 光只会沿直线前进,一定不会进入到O点下方的墙上 C . 光的波长越长,光线进入到O点下方墙上的区域越大 D . 光的能量越大,光线进入到O点下方墙上的区域越大—You didn’t take the high-speed train with the leading letter "G" to Shanghai?   —________. I still took the "D" train, which saved me more than 50 yuan.   A.Yes, I didn't     B.No, I did   C.Yes, I did   D.No, I didn't
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