【单选题】“signpost”的意思是 A. 加速85 B. 限速85 C. 罚款85 D. 速度85
【单选题】“signpost”的意思是 A. 加速85 B. 限速85 C. 罚款85 D. 速度85
.抽取一个容量为100的随机样本,其均值85,标准差为9,总体均值90%的置信区间为()。 A: 85±1.97 B: 85±1.48 C: 85±1.76 D: 85±1.52
.抽取一个容量为100的随机样本,其均值85,标准差为9,总体均值90%的置信区间为()。 A: 85±1.97 B: 85±1.48 C: 85±1.76 D: 85±1.52
健康血压值为( )? 120/85毫米汞柱 ;|135/85毫米汞柱|130/85毫米汞柱|20/80毫米汞柱
健康血压值为( )? 120/85毫米汞柱 ;|135/85毫米汞柱|130/85毫米汞柱|20/80毫米汞柱
患者,男性,48岁,身高175cm,体重85kg,血压、血糖都偏高,有中度脂肪肝。该患者的体重指数是() A: 85/1.75 B: 85/175 C: 175/85 D: 85/175 E: 175/85
患者,男性,48岁,身高175cm,体重85kg,血压、血糖都偏高,有中度脂肪肝。该患者的体重指数是() A: 85/1.75 B: 85/175 C: 175/85 D: 85/175 E: 175/85
Didyouknowthatthenoiseinyourschoolyardcanharmyourhearingseriously?Duringbreaksatschool,youfindyourselfinthemiddleofloudactivitiesinthehallwaysandtheschoolyard.Youneedbreakstohavefunwithyourfriends,butyoushouldbecarefulasthenoiseatschoolcanbedangeroustoyourhearing.Herearesomeexamplesofschoolyardnoise:・Climbingthejunglegym(atadistanceof25meters):70-100dB(分贝);・Girlshouting(atadistanceof3meters):120dB;・Boyshouting(atadistanceof3meters):I20-130dB;・Studentsthrowingashovel(铁铲)onawoodenbox(atadistanceof1meter):135dBSomefactors(因素)decidehowharmfulanoiseistothehumanear:thedistancetothenoise,thelevelofthenoiseandthetimeitlasts.Wecanstandnoiseatthelevelof85dBforeighthoursaday.Butasthenoiseincreases,wecanonlystandthenoiseforshorterandshorterperiodsoftime.Whenthenoiselevelreaches115dB,ourearscanstanditforlessthan30secondsaday.Noiseatthelevelof130dBharmsyourhearingifyouhearitformorethanonesinglesecondaday.Ifyouwanttoenjoyyourbreaks,youshouldhelpkeepingthenoiseleveldown.1.Fromthepassage,weknowthat______factorsdecidehowharmfulanoiseistothehumanear.A.twoB.threeC.fourD.five2.Ourhearingwillnotbeharmedbynoise______.A.atthelevelof85dBfor12hoursadayB.atthelevelof115dBfor20secondsadayC.atthelevelof130dBfor5secondsadayD.atthelevelof135dBfor3secondsaday3.Whatisthemainideaofthepassage?A.Noiseatschoolcanreachveryhighlevels.B.Therearemanykindsofnoiseintheschoolyard.C.Studentsshouldn'thaveactivitiesintheschoolyard.D.Noiseatschoolcanbeveryharmfultostudents'hearing.4.Howmanyhourscanwestandnoiseatthelevelof85dBperday?A.fivehoursB.eighthoursC.fourhoursD.onehour(10.0分)
Didyouknowthatthenoiseinyourschoolyardcanharmyourhearingseriously?Duringbreaksatschool,youfindyourselfinthemiddleofloudactivitiesinthehallwaysandtheschoolyard.Youneedbreakstohavefunwithyourfriends,butyoushouldbecarefulasthenoiseatschoolcanbedangeroustoyourhearing.Herearesomeexamplesofschoolyardnoise:・Climbingthejunglegym(atadistanceof25meters):70-100dB(分贝);・Girlshouting(atadistanceof3meters):120dB;・Boyshouting(atadistanceof3meters):I20-130dB;・Studentsthrowingashovel(铁铲)onawoodenbox(atadistanceof1meter):135dBSomefactors(因素)decidehowharmfulanoiseistothehumanear:thedistancetothenoise,thelevelofthenoiseandthetimeitlasts.Wecanstandnoiseatthelevelof85dBforeighthoursaday.Butasthenoiseincreases,wecanonlystandthenoiseforshorterandshorterperiodsoftime.Whenthenoiselevelreaches115dB,ourearscanstanditforlessthan30secondsaday.Noiseatthelevelof130dBharmsyourhearingifyouhearitformorethanonesinglesecondaday.Ifyouwanttoenjoyyourbreaks,youshouldhelpkeepingthenoiseleveldown.1.Fromthepassage,weknowthat______factorsdecidehowharmfulanoiseistothehumanear.A.twoB.threeC.fourD.five2.Ourhearingwillnotbeharmedbynoise______.A.atthelevelof85dBfor12hoursadayB.atthelevelof115dBfor20secondsadayC.atthelevelof130dBfor5secondsadayD.atthelevelof135dBfor3secondsaday3.Whatisthemainideaofthepassage?A.Noiseatschoolcanreachveryhighlevels.B.Therearemanykindsofnoiseintheschoolyard.C.Studentsshouldn'thaveactivitiesintheschoolyard.D.Noiseatschoolcanbeveryharmfultostudents'hearing.4.Howmanyhourscanwestandnoiseatthelevelof85dBperday?A.fivehoursB.eighthoursC.fourhoursD.onehour(10.0分)
下列哪种情况属于超卖状态?() A: WMS=85 B: WMS=15 C: K=85 D: D=85
下列哪种情况属于超卖状态?() A: WMS=85 B: WMS=15 C: K=85 D: D=85
一位体检者的身高为177厘米,体重为170斤,他的体重指数计算方法为() A: (85)/177 B: 85/1.77 C: 85/(1.77) D: 85/(177)
一位体检者的身高为177厘米,体重为170斤,他的体重指数计算方法为() A: (85)/177 B: 85/1.77 C: 85/(1.77) D: 85/(177)
高中某班进行英语测试,随机抽取10位学生,成绩如下:90、100、87、65、72、83、85、85、95、85,其众数是()。 A: 82 B: 83 C: 84 D: 85
高中某班进行英语测试,随机抽取10位学生,成绩如下:90、100、87、65、72、83、85、85、95、85,其众数是()。 A: 82 B: 83 C: 84 D: 85
如果调查应答率至少为总样本的85%,那么实际应调查的样本量为()。 A: An/(1+85%) B: Bn/(1-85%) C: Cn/85% D: Dn×85% E: En/85%/α
如果调查应答率至少为总样本的85%,那么实际应调查的样本量为()。 A: An/(1+85%) B: Bn/(1-85%) C: Cn/85% D: Dn×85% E: En/85%/α
船舶主机长期运转中所使用的功率往往比标定功率小,其大小一般为标定功率的() A: 70%~85% B: 80%~85% C: 85%~90% D: 85%~95%
船舶主机长期运转中所使用的功率往往比标定功率小,其大小一般为标定功率的() A: 70%~85% B: 80%~85% C: 85%~90% D: 85%~95%