为测量Fw，高能X线射野中心轴上深度d取（） A.d＝0.5cm B.d＝1.5cm

完形填空(本题共15小题, 每小题1分, 共15分)
On my first day of high school, I met David. It was cloudy. When I went home after school, I saw a boy also walking back home. He was my classmate, David. He was carrying his books. 21._______ he was walking, I saw a group of kids rushing to him. David 22._______ and his glasses went flying. All his 23._______ fell on the ground. Then the kids ran away. He looked up and I saw sadness in his eyes. I helped him stand up and 24._______ his glasses. Then I saw there 25._______ a big smile on his face.
From then on, we became 26._______. The more I got to know David, the more I liked him. During the four years, we always studied, played together and had a 27._______ time.
On the day when we finished high school, I could see that he was 28._______ about his speech. So I said, “Don’t be stressed out. Believe in 29._______ and you’ll be the best!” Then he began, “Today is a good time to say 30._______ to those people who helped you succeed through the difficult years. Our parents, our teachers, but mostly our 31._______. Being a friend to someone is the best gift you can give them. I’ll 32._______ you a story…” I just looked at the handsome popular boy amazingly when he told the story of the 33._______ day when we met each other.
All of us were 34._______. Everyone was listening to his story in silence. I saw his parents looking at me and smiling. I did not know the deep meaning 35._______ that moment. I know even a small action can change a person’s life. As you know, “Friends are angels to make us rise when our wings have problems flying.”

小题1: A. Because	B. While	C. Though
小题2: A. fall down	B. fell down	C. falling down
小题3: A. books	B. money	C. glasses
小题4: A. look for	B. look after	C. look like
小题5: A. is	B. was	C. will be
小题6: A. classmates	B. students	C. friends
小题7:A. happy	B. bad	C. sad
小题8: A. bored	B. nervous	C. excited
小题9: A. himself	B. yourself	C. myself
小题10: A. hello	B. sorry	C. thanks
小题11: A. friends	B. parents	C. teachers
小题12:A. give	B. tell	C. ask
小题13:A. first	B. second	C. last
小题14: A. crazy	B. quiet	C. strange
小题15: A. until	B. for	C. but