Using transfer matrix method to analyze microperforated panel absorber s acoustic characteristic;2. The possibility and the significance of replacing fibred absorption materials by fibreless materials,especially by microperforated panels,are discussed.

簡(jiǎn)要地介紹了吸聲材料的基本特點(diǎn)国产www视频，闡述了無(wú)纖維性吸聲材料（特別是微穿孔板吸聲結(jié)構(gòu)）取代傳統(tǒng)的纖維性吸聲材料的可能性及其重要意義，較詳細(xì)地介紹了近年來(lái)德國(guó)以及我國(guó)科研人員在無(wú)纖維吸聲材料研究上所取得的進(jìn)展亚洲欧美熟妇另类久。

The results showed that:(1) compared with never smokers, former smokers used more medical services of all types with the except of herb doctor care. but only differences in number of emergency visits (by 4.5%), rate of and number of days of self-medication with western drugs (by 1.39 times and 18.7%, respectively) were statistically significant after adjusting for other sociodemographic variables; and (2) compared with never smokers, current smokers used more hospital care, emergency care and self-medication with western drugs, but only differences in rate of and number of days of self-medication with western drugs (by 0.63 times and 6.6%, respectively) were statistically significant after adjusting for other socio-demographic variables.

結(jié)果顯示：(1)已戒菸者除中醫(yī)門診外www.mmm在线观看，其他各類醫(yī)療服務(wù)的利用率與利用量皆高於從不吸菸者，但在控制其他自變項(xiàng)以后老妇操B网，只有急診次數(shù)（增加4.5%）以及自服西藥的比率（增加1.39倍）與天數(shù)（增加18.7%）上的差異具統(tǒng)計(jì)顯著意義女人自慰喷潮A片免费观看w；(2)目前吸菸者則只在住院、急診以及自服西藥的利用率與利用量上皆高於從不吸菸者717理伦午影院无码，但控制其他自變項(xiàng)以后玖玖视频久久，亦只有自服西藥的比率（增加0.63倍）與天數(shù)（增加6.6%）上的差異具統(tǒng)計(jì)顯著意義。

objective to observe the effect of liver function to long-term burning caffeine sodium benzoateinhalation.methods to compare the liver function of long-term inhalation burning caffeine sodium benzoate group with that of control group by modular p800 making in usa.results between term of long-term burning caffeine sodium benzoate and term of controls were significantly different at total bilitubin,there were different at glutamic pyruvic transaminase,glutamic oxaloacetic transaminase,creatinine (p.05).conclusion long-term inhalation of the burning caffeine sodium benzoate would lead to significantly effect on liver function.

目的 探討長(zhǎng)期燙吸安鈉咖對(duì)肝功能的影響日韩精品91。方法應(yīng)用美國(guó)生產(chǎn)的modular p800儀器人人操人人操人人色人人操人人色人人摸，對(duì)燙吸安鈉咖組36例及正常對(duì)照組14例測(cè)定肝功能情況，對(duì)結(jié)果進(jìn)行比較分析有亚洲一级黄色视频。結(jié)果燙吸安鈉咖組與對(duì)照組比較欧美日本电影，燙吸組總膽紅素較對(duì)照組的含量明顯降低，在統(tǒng)計(jì)學(xué)上差異有顯著性（p＜0.01）亚洲熟女精品一区二区三区。燙吸組谷丙轉(zhuǎn)氨酶国产精品福利在线观看入口、谷草轉(zhuǎn)氨酶、肌酐較對(duì)照組升高樱桃视频ios下载，在統(tǒng)計(jì)學(xué)上差異有顯著性（p ＜0.05）机械有限后入高潮。結(jié)論長(zhǎng)期燙吸安鈉咖對(duì)肝功存在明顯的影響。

Structure is willing to work rationale : the paper to paper on stage by infrared absorption into the lamp drying wind hield, After Road from the conveyor belt and crushed round brush and brush so that the paper dust from the suction fan sucked out; B-type structures of the A-type unction on the basis of additional wetting a paper on the roll so that the small amount of residue below dust by wetting roll away, except on the following powder to the best results.

型結(jié)構(gòu)工作愿理：紙張?jiān)诮o紙臺(tái)上通過(guò)紅外燈管烘干送入吸風(fēng)罩內(nèi)国产美女高潮流白浆视频18，由輸送帶經(jīng)過(guò)道輪刷輾和排刷使紙張上的粉塵由吸風(fēng)機(jī)吸走国产精品国产亚洲精品看下卡；B 型結(jié)構(gòu)是在 A 型功能的基礎(chǔ)上增設(shè)一道潤(rùn)濕輥使紙張上下面殘留的少量粉塵由潤(rùn)濕輥帶走，使上下面除粉達(dá)最佳效果日本熟妇乱人伦A片视频。

Moreover, taking the adsorption process from oven-dry state to the equilibrium state in 20℃,60%RH environment as an example, the dielectric relaxation based on the reorientation of adsorbed water molecules was separated out from that based on the methylol groups in the amorphous region of wood cell wall.

以絕干狀態(tài)→20℃欧美一级A片全视频，60%RH 平衡態(tài)的吸濕過(guò)程為例，將基于吸著水分子回轉(zhuǎn)取向運(yùn)動(dòng)的介電弛豫與基于木材無(wú)定形區(qū)中伯醇羥基回轉(zhuǎn)取向運(yùn)動(dòng)的介電弛豫進(jìn)行分離亚洲一区二区激情在线，并在 Eyring 的絕對(duì)速度反應(yīng)論的基礎(chǔ)上国产精品超碰，求得了與吸著水分子進(jìn)行回轉(zhuǎn)取向運(yùn)動(dòng)相關(guān)連的熱力學(xué)量，得到了在吸著過(guò)程中吸著水分子與木材吸著點(diǎn)之間的氫鍵結(jié)合隨著水分吸著進(jìn)程的變化情況香蕉五月天在线精品。

A cleaner includes a suction motor mounted in a cleaner main body, and generating a suction force; a filter for collecting dust or filth sucked by the suction force generated at the suction motor; a suction head connected with the filter by a suction tube, and sucking dust and filth on a floor; a brush installed in the suction head so as to ascend/descend in a vertical direction, and sweeping dust and foreign substances into the suction head; and a brush height control apparatus installed in the suction head, and making the brush ascend/descend in a vertical direction.

一種吸塵器射射射射射射综合网，它包括安裝在吸塵器主體內(nèi)并且產(chǎn)生吸力的吸塵馬達(dá)；收集由吸塵馬達(dá)所產(chǎn)生的吸力吸入的塵土或污物的過(guò)濾器；通過(guò)吸塵管與過(guò)濾器連接的吸塵頭男女深夜福利视频网站，吸塵頭吸入地板上的塵土和污物a欧美亚洲电影图片迅雷下载；安裝在吸塵頭內(nèi)從而可以在垂直方向上上升/下降的刷子，它將塵土和異物掃入吸塵頭日韩欧美A片一级久久72；和刷子高度控制設(shè)備国产色视频一区，它安裝在吸塵頭中亚洲热在线视频店，并且使刷子在垂直方向上上升/下降黄页视屏在线看。

We found a truck dirver, and slipped him a fire?dollar bill, and he let me put my head near his exhoust pipe for a half hour.

我們找到了一位卡車司機(jī)，塞給他一張五美元的鈔票国产不卡久久精品影院尤物，他便讓我把頭靠近卡車的排氣管色色av无码，吸上了半個(gè)鐘頭。

On the basis of experiments, the mechanism of phosphorus gettering for crystalline silicon were suggested.

本文在對(duì)常規(guī)磷吸雜的基礎(chǔ)上人妻在线交插，研究了晶體硅材料的變溫磷吸雜和快速磷吸雜欧美黄色小视频在线，并在實(shí)驗(yàn)的基礎(chǔ)上對(duì)晶體硅材料磷吸雜機(jī)理做了深入的研究，得到了如下主要結(jié)果：對(duì)晶體硅材料來(lái)說(shuō)95免费视频，恒溫磷吸雜有一個(gè)最佳的吸雜溫度范圍国产春色一级视频免费，高于或低于該溫度吸雜效果都不理想。

But in spite of the fact that I am in the park so much of the time, I share feelings like those of less frequent visitors: I still ③gasp at the massive granite cliffs of Yosemite Valley; I still inhale deeply to capture the scent of giant sequoias and I still seek the serenity of their groves; I still ④exult in feeling moist sphagnum moss cushioning my feet and squirting water through my toes in the sub-alpine meadows of White Wolf; I am still fascinated by the activities of squirrels, pocket gophers, bears, and nutcrackers; I am still surprised and wonder-struck with new revelations and discoveries; and I still feel I can't adequately describe in words my feelings and sensations of Yosemite or, for that matter, the meaning this place has for me.

不過(guò)激情小说另类，盡管我大部分時(shí)間都呆在公園里中文在线中文字幕，但我與那些不怎么頻頻造訪的游客的感受是相同的：我仍會(huì)驚訝于約塞米蒂峽谷的巨大花崗巖懸崖；我仍會(huì)為了聞到巨型紅杉的香味而狠狠地吸上一口氣操美女6666，并仍會(huì)在紅杉林中尋找靜謐之處人日人视屏；我仍會(huì)在行走于&白狼地區(qū)&亞高原草地之際，當(dāng)潮濕的水苔使我的腳下松松軟軟并將水滲過(guò)我的腳縫之時(shí)毛片免费看不卡网站，為那種感覺(jué)而驚喜亚洲国产一区区三区在线播放；我仍會(huì)為松鼠、口袋地鼠美女黄色视、狗熊和星鴉的活動(dòng)而著迷国内视频偷拍网站；我仍會(huì)對(duì)新的發(fā)現(xiàn)和探索而感到吃驚和萬(wàn)分驚奇；而且我仍會(huì)感到我窮于用言語(yǔ)來(lái)表達(dá)我對(duì)約塞米蒂的感覺(jué)和感受亚洲综合激情另类小说，甚至不能表達(dá)出這個(gè)地方對(duì)我的意義所在免费无码不卡a片。

Great efforts should be made to inform young people especially the dreadful consequences of taking up the hab IT .

應(yīng)該盡最大努力告訴年輕人吸煙的危害，特別是吸上煙癮后的可怕后果操人免费网站。