读下图，完成下题。
小题1:图中天体M可能是 ( )
①水星 ②火星 ③天王星 ④金星 ⑤木星 ⑥土星 ⑦海王星
A．②⑥
B．④⑤
C．③⑦
D．①④小题2:图中的阴影区表示的是 ( )
A．黄道面
B．赤道面
C．地球公转轨道
D．赤道小题3:图中箭头显示了 ( )
A．共面性
B．同向性
C．近圆性
D．随意性
小题1:D
小题2:A
小题3:B
题目分析：
小题1:M行星在地球轨道内侧，太阳系中运行在地球轨道内侧的行星只有水星和金星。选D正确。
小题2:图中阴影是地球绕日运行的公转轨道平面即是黄道面。不是单纯的公转轨道。赤道是地球自转的轨道。选A正确。
小题3:箭头方向是M行星和地球绕日运行的公转方向，都是自西向东，具有同向性。图中箭头看不出其他特征。选B正确。
Whenever I felt disappointed I often thought of what my mother had said to me，“Everything happens for the best.If you____，one day something good will happen.And you'll realize that it wouldn't have happened if not for that previous____．” As it____，mother was right.In 1932，I ended my college life.____ that，I had decided to try for a job in radio，and then could work my way up to sports ___．I went to Chicago and knocked on the door of every____－and got turned down every time.In one station，a ____ lady told me that big stations couldn't risk hiring a person who lacked ____．“Go to ____ town and find a little station that'll give you a chance，” she said.I then ____ to Dixon.While there was no radioannouncing jobs in Dixon，my father said Montgomery Ward had opened a store and wanted an athlete to ____ its sports department.Since Dixon was where I had played high school football，I ____．The job sounded just right for me.But I wasn't ____． My disappointment must have ___．“Everything happens for the best，” Mom ____ me.Dad ____ me one car for me to job hunt.I ____ WOC Radio in Davenport.The program ___，a wonderful Scotsman named Peter MacArthur，told me they had already ___ a contract with another announcer. I often ____ what direction my life might have taken if I'd gotten the job at Montgomery Ward and if I didn't persist.
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