问题
单项选择题
（）是分析操作过程中的某些经常发生的原因造成的。
A.系统误差
B.偶然误差
C.过失误差
D.随机误差
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
（）是分析操作过程中的某些经常发生的原因造成的。
A.系统误差
B.偶然误差
C.过失误差
D.随机误差
参考答案：A
| 完形填空。 | |||
| "How did you do it, Dad? How have you ___l___not to take a drink for almost 20 years?" It took me almost 20 years to have the 2 to even ask my father this very 3 question. When Dad first 4 drinking,the whole family was on pins and needles 5 he got into a situation that,in the past,would have started him drinking again. For a few years we were 6 to bring it up for fear that the drinking would begin again. "I had this little 7 that I would recite to myself 8 four to five times a day" was Dad's 9 to my 18-year-old unasked question. "The 10 were an instant relief and constant reminder to me that things were never so 11 that I could not handle them, " Dad said. And then he 12 the poem with me. The poem's simple, yet profound(深奥的) words 13 became part of my daily routine as well. About a month after this talk with my father, 14 a gift in the mail from a friend of mine. It was a book of affirnations(断言) with one affirmation listed for each 15 of the year. I 16 opened the book to the page of my birthday to see what words of wisdom this book had in store for me. 17 of disbelief and appreciation rolled down my face. There , on my birthday , was the 18 poem that had helped my 19 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 20 the things l can,and the Wisdom to know the difference. | |||
| ( )1.A. failed ( )2.A. courage ( )3.A. interesting ( )4.A. started ( )5.A. every time ( )6.A. anxious ( )7.A. book ( )8.A. at least ( )9.A. comment ( )10.A. words ( )11.A. strange ( )12.A. shared ( )13.A. surprisingly ( )14.A. brought ( )15.A. hour ( )16.A. easily ( )17.A. Tears ( )18.A. correct ( )19.A. mother ( )20.A. believe | B. succeeded B. ability B. personal B. enjoyed B. all time B. glad B. passage B. at most B. praise B. phrases B. different B. talked B. immediately B. bought B. week B. hurriedly B. Smiles B. impossible B. father B. benefit | C. managed C. wisdom C. hard C. minded C. next time C. afraid C. poem C. at first C. contribution C. letters C. simple C. read C. increasingly C. received C. month C. sadly C. Sweat C. original C. friend C. change | D. tried D. confidence D. unanswered D. stopped D. last time D. eager D. list D. at last D. reply D. sentences D. tough D. impressed D. regularly D. accepted D. day D. peacefully D. Satisfaction D. exact D. classmate D. do |