问题
单项选择题
沟裂狭窄而长，底部膨大朝向釉牙本质界的窝沟是
A．P型窝沟
B．V型窝沟
C．U型窝沟
D．I型窝沟
E．C型窝沟
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
沟裂狭窄而长，底部膨大朝向釉牙本质界的窝沟是
A．P型窝沟
B．V型窝沟
C．U型窝沟
D．I型窝沟
E．C型窝沟
参考答案：D
“Everything happens for the best,” my mother said whenever I 36 disappointment. “If you can carry on, one day something 37 will happen. And you’ll realize that it wouldn’t have happened if not for that 38 disappointment.” Mother was right, 39 I discovered after graduating from college in 1932. I had decided to 40 a job in radio, then work my way up to sports 41 . I hitchhiked（搭便车） to Chicago and 42 on the door of every station—and got turned 43 every time. In one studio, a kind lady told me that big stations couldn’t risk hiring an 44 person –“Go out in the sticks（偏远地区） and find a small station that will give you a 45 ,” she said. I thumbed home to Dixon, Illinois. 46 there was no radio—announcing job in Dixon, my father said Montgomery Ward had opened a store and wanted a local athlete to 47 its sports department. Since Dixon was where I had played high school football. I 48 . The job 49 just right for me. But I wasn’t hired. My disappointment must have 50 . “Everything happens for the best,” Mom 51 me. Dad offered me the car to job hunt. I tried WOC Radio in Davenport, Iowa. The program director, a wonderful Scotsman named Peter MacArthur, told me they had already hired an announcer. As I left his office, my frustration 52 . I asked aloud, “How can a fellow get to be a sport announcer if he can’t get a job in a radio station?” I was waiting for the elevator 53 I heard MacAethur calling, “What was that you said about sports? Do you know anything about football?” Then he asked me to stand before a microphone and to broadcast a (an) 54 game. On my way home, once again I thought of my mother’s words. I often wonder what 55 my life might have taken if I’d gotten the job at Montgomery Ward.
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