ThepeoplewholivedinRomethousandyearsagowerealreadycomplainingaboutthenoiseintheircity.Theycouldn’tsleep,theysaid,withallthat(21)_______inthestreets.Forthem,noisewas(22)________adisturbance.Forusishasbecomeareal(23)_______.Weknowthatthesoundsofan(24)______cityareloudenoughtocauseseriousdamagetotheinhabitants’(居民)(25)______--intheUnitedStates,oneoutoftwentyhassufferedsomehearing(26)______.Andallovertheworldthesituationis(27)______allthetime,sincenoiseincreaseswiththepopulation.Ithasalsoincreasedenormouslyinthetwentiethcentury(28)____________.Weliveinanenvironmentsurroundedbyloudplanes,trucks,motorcycles,buses,electrictools,radios,etc.Thatroardayandnightupto90or100decibels(分贝).Unfortunately,thehumaneardoesnotjudgeclearly(29)_________________.Asoundtendecibelslouderthananotheroneisfeltastwiceasloud,wheninfactitistentimeslouder.Sincewecannotmeasuretheincreaseordecreaseofnoise,(30)__________________.
举一反三
- 4. 已知20个数据如下: 25 21 29 30 24 25 29 28 27 23 27 26 22 24 28 26 25 23 25 27 对这些数据进行分析,其中24.5~26.5这一组的频率是( ) A: A.0.40 B: B.0.30 C: C.0.55 D: D.0.25
- 那几个态度最佳? A: 21 B: 22 C: 23 D: 24 E: 25 F: 26 G: 27 H: 28 I: 29 J: 30
- 写出下列作品的作者。○21《红旗谱》()○22《青春之歌》()○23《创业史》()○24《铁道游击队》()○25《花城》()○26《林海雪原》()○27《白毛女》()○28《红岩》()○29《李双双》()○30《班主任》()
- 10个工人的日产量数据如下:32、30、29、28、26、24、20、21、22、36,则中位数是( ) A: 25 B: 27 C: 24 D: 31
- 厨房内较适宜的温度应控制在冬天()左右,夏天()左右。 A: 22℃~26℃,24℃~28℃ B: 23℃~24℃,24℃~28℃ C: 21℃~25℃,22℃~26℃ D: 22℃~24℃,24℃~26℃