某标准样品中铁含量为99.18，测得含量为99.13其绝对误差为（）。A、+0.05 发布时间：2017-08-16 03:53 │ 来源：www.tikuol.com 题型：单项选择题 问题： 某标准样品中铁含量为99.18，测得含量为99.13其绝对误差为（）。A、+0.05B、-0.05C、0.05D、0.50
题型：单项选择题 在“探究小车速度随时间变化的规律”的实验中，下列做法可以减小实验误差的是（ ）A．选取计数点，把每打五个点的时间间隔作为一个时间单位B．使小车运动的加速度尽量小一些C．舍去纸带上密集的点，只利用点迹清晰、点间间隔适当的那部分进行测量、计算D．选用各处平整程度相同的长木板做实验 查看答案
题型：单项选择题 完形填空 Michel is a young girl who works for the police 1 a handwriting expert (专家). She has helped 2 many criminals (罪犯) by using her special talents (天才). When she was fourteen, Michel was already 3 interested in the differences in her friends' 4 that she would spend hours 5 them. After 6 college she went to France for a 7 two-year class in handwriting at the School of Police Science. Michel says that it is 8 for people to hide their handwriting. She can discover 9 of what she needs to know simply 10 looking at the writing with her own eyes, 11 she also has machines 12 help her make 13 different kinds of paper and ink. This knowledge is often 14 great help to the police. Michel believes that handwriting is a good 15 of what kind of person the 16 is. "I wouldn't go out with a fellow 17 I didn't like his handwriting." She says. But she 18 she fell in love with her future husband, a young policeman 19 she studied his handwriting. It is later proved to be 20 , however.( )1. A. with ( )2. A. search ( )3. A. so ( )4. A. books ( )5. A. writing ( )6. A. attending ( )7. A. powerful ( )8. A. main ( )9. A. most ( )10. A. with ( )11. A. so ( )12. A. they ( )13. A. up ( )14. A. of ( )15. A. test ( )16. A. thief ( )17. A. whether ( )18. A. adds ( )19. A. before ( )20. A. necessary ( )1. A. with ( )2. A. search ( )3. A. so ( )4. A. books ( )5. A. writing ( )6. A. attending ( )7. A. powerful ( )8. A. main ( )9. A. most ( )10. A. with ( )11. A. so ( )12. A. they ( )13. A. up ( )14. A. of ( )15. A. test ( )16. A. thief ( )17. A. whether ( )18. A. adds ( )19. A. before ( )20. A. necessary C. like C. catch C. quite C. tongues C. settling C. starting C. special C. easy C. little C. of C. thus C. that C. for C. with C. means C. writer C. if C. repeats C. so C. important D. as D. judge D. extra D. handwriting D. uncovering D. stepping into D. common D. impossible D. sight D. about D. but D. those D. into D. for D. habit D. policeman D. after D. cries D. and D. quite easy 查看答案