问题
多项选择题
齿轮转动的缺点是（）。
A、成本较高
B、不能承受剧烈的冲击和过载
C、不宜用于中心距较大的场合
D、使用寿命短
答案
参考答案：A, B, C, D
搜题请搜索小程序“爱下问搜题”
齿轮转动的缺点是（）。
A、成本较高
B、不能承受剧烈的冲击和过载
C、不宜用于中心距较大的场合
D、使用寿命短
参考答案：A, B, C, D
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| "How did you do it, Dad? How have you managed not to take a drink for almost 20 years?" It took me almost 20 years to have the 1 to even ask my father this very personal question. When Dad first 2 drinking, the whole family was on pins and needles every time he got into a 3 that, in the past, would have started him drinking again. For a few years we were 4 to bring it up for fear that the drinking would begin again. "I had this little 5 that I would recite to myself at least four to five times a day" was Dad's 6 to my 18-year-old unasked question. "The 7 were an instant relief and constant 8 to me that things were never so 9 that I could not handle them," Dad said. And then he 10 the poem with me. The poem's simple, yet profound (深刻的) words immediately became part of my daily routine as well. About a month after this talk with my father, I 11 a gift in the mail from a friend of mine. It was a book of daily sayings of wisdom with one listed for each day of the year. I 12 opened the book to the page of my birthday to see what words of wisdom this book had in store for me. 13 of disbelief and appreciation rolled down my face. There, on my birthday, was the exact same poem that had helped my 14 for all these years! It is called The Serenity Prayer. God, give me the Serenity (平静) to accept the things I cannot change, the Courage to 15 the things I can, and the Wisdom to know the difference. | |||
| ( )1.A. confidence ( )2.A. too k up ( )3 A. way ( )4.A. anxious ( )5.A. book ( )6.A. reply ( )7.A. letters ( )8.A. fear ( )9.A. tough ( )10.A. shared ( )11.A. brought ( )12.A. easily ( )13.A. Satisfaction ( )14.A. mother ( )15.A. change | B. ability B. went on B. situation B. glad B. text B. praise B. phrases B. imagination B. different B. talked B. bought B. hurriedly B. Smiles B. father B. benefit | C. wisdom C. gave up C. habit C. eager C. poem C. contribution C. words C. thought C . simple C. read C. accepted C. sadly C. Sweat C. friend C. believe | D. courage D. carried on D. house D. afraid D. lesson D. comment D. sentences D. reminder D. strange D. impressed D. received D. peacefully D. Tears D. classmate D. do |