问题
单项选择题
下列选项中不属于回转式压缩机的是( )。
A．单作用式压缩机
B．鼓风机
C．双作用式压缩机
D．转子式压缩机
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
下列选项中不属于回转式压缩机的是( )。
A．单作用式压缩机
B．鼓风机
C．双作用式压缩机
D．转子式压缩机
参考答案：D
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| "Everything happens for the best." my mother said whenever I felt disappointed. " __1__, and one day something good will happen. Then you'll realize it wouldn't have happened __2__the disappointment you had experienced __3_ ." Mother was right, __4__I discovered after graduating from college, I had decided to try for a job __5__ radio, then __6__my way up to a sports announcer. I hitchhiked (搭免费车) to Chicago and tried every station, but got __7__. In one studio, a kind lady told me big stations couldn't risk hiring inexperienced persons. "Try your luck in the __8_ " she said. I hitchhiked home to Dixon, Illinois, where there was no radio-announcing jobs. My father said a store wanted a local __9_to manage its sports department. Since Dixon was __10_ I had played high school football, I __11_ . The job sounded just __12_ for me. But l wasn't hired. My disappointment __13_ have shown. "Everything harem for the best." Mother __14_ . Then I tried WOC Radio in Davenport, Iowa. The program director, Peter MacArthur, told me they had already hired an announcer. As I left his office, my disappointment boiled _15_ . I asked aloud. "How can a fellow become a sport announcer if he can't get a job in a radio station?" I was waiting for the __16_ when I heard MacArthur calling, "What was that you said about sports? You know something about football?" Then he __17_ me before a __18_ and asked me to broadcast a(n) __19_game. On my way home, as I have many times __20_ , I thought of my mother's words. | |||
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