读“南亚地区图”和“印度水稻小麦分布图”，完成下列各题。
— John, could you please the black-board now? It's your duty today.— OK. I'll do it right away.
如图所示，小明用同一个相机给同一个古塔拍了四张照片，拍摄下列哪张照片时镜头伸出最长（ ）
