某人的前后左右都是正北方，他站的位置是（　　）

2015年5月，中国数百万网友掀起了一场“为老兵擦亮勋章”的活动，下图是一位老兵获得的勋章。据此可判断这位老兵经历过（    ）

    Hello, my____ is Li Ming. I am 14 years old．I go to Ximen School. This is a photo ____ my family. They____ my parents. He is my father and she is my mother. My father is 40 years old and my mother is 38 years old．My father is a ____in a hospital . My mother is an English____ in my school.My sister is 12 years old .We are in the ____ school .There are two big____ in front of my house. I____ my family.

如图中画出了光线通过透镜（图中未画出）的情形，其中凸透镜是（　　）

1元比10角少．