【正文】 中樞神經(jīng)麻痹和痙攣。吸入后可在肺的深部產(chǎn)生強烈刺激作用，可以引起胸部繃緊，降低肺功能，使呼吸道對室內(nèi)塵埃過敏，通過破壞其自然凈化機能，增加濾過性毒菌感染的易感性，降低人體對感染的抵抗力。另外， NOx 還可參與形成空氣中的飄塵（ ）?？偟膩碚f , 碳煙顆粒物質(zhì)由三種基本物質(zhì)組成：固體物質(zhì)即干碳微粒，俗成黑煙；吸附凝結(jié)了大量碳氫化合物的碳微粒； SO4 硫酸鹽物質(zhì)即硫酸水合物。發(fā)動機燃用汽油、柴油或醇燃料時，排氣中都會產(chǎn)生 醛類排放物，但是醇燃料發(fā)動機排氣中醛類排放物比汽油機或柴油機大 2— 10 倍不等。緊急進行解毒處理后，也會導致失明。三元催化器，它可將汽車尾氣排出的 CO、 HC 和 NOx 等 有害氣體通過氧化和還原作用轉(zhuǎn)變?yōu)闊o害的二氧化碳、水和氮氣。 結(jié)構(gòu)： 三元催化反應器類似消聲器。 凈化劑： 凈化劑由載體和催化劑組成。將其中一種噴涂在載體上，就構(gòu)成了凈化劑。 NOx 還 原成 9 氨氣（ N2）和（ O2 ）。 ⑵、應避免未燃燒的混合氣進入催化器。因此，在車輛使用過程中要注意以下幾種情況： ①過久的怠速空轉(zhuǎn)； ②點火時間過遲； ③個 別缸失火不工作； ④噴油正常但啟動困難； ⑤混合氣過濃； ⑥發(fā)動機燒機油等。此途徑使汽車根本不產(chǎn)生或只產(chǎn)生很少的污染氣體。而且，甲醇生產(chǎn)有工藝簡單，設(shè)備少，運輸方便等特點。無疑，對控制酸雨是有利的，而且是目前能夠?qū)崿F(xiàn)了的。是一種非常有前途的低公害節(jié)能汽車。而現(xiàn)在一種不用活塞、渦輪和三角活塞 ,尾氣排放物為潔凈的水滴 ,蒸汽及二氧化碳的新式發(fā)動機 ——— 齒輪轉(zhuǎn)子旋轉(zhuǎn)發(fā)動機在昆明試制成功并進行了臺架運轉(zhuǎn)。還變革了渦輪發(fā)動機 “ 沖動旋轉(zhuǎn) ” 理論及葉輪縫隙泄漏的弊端。實驗中的齒輪轉(zhuǎn)子旋轉(zhuǎn)發(fā)動機可使用汽油、煤油和石油液化氣做燃料 ,運轉(zhuǎn)后整套裝置無煙、無塵、無異味 ,排放物為白色的水蒸氣和水滴?？煞譃榇呋?、熱反應器和過濾收集器等兩類。由于三元催化器中催化劑是蜂窩結(jié)構(gòu)，蜂窩表面涂有催化材料，與廢氣的接觸表面 積非常大，所以其凈化效率很高。 二次空氣供給 二次空氣供給系統(tǒng)是在排氣管的上段設(shè)置一個反應器，通過空氣泵、控制閥、單向閥和噴射管等引入適量的新鮮空氣，在高溫下，令 CO 和 HC 在熱反應器內(nèi)繼續(xù)燃燒 (生成 H： 0 和 CO： )，從而進一步減少 了 CO 和 HC 的排放量。為滿足越來越嚴的排放法規(guī)要求，必須提高燃料質(zhì)量和采用先進的發(fā)動機技術(shù)。采用渦輪增壓的柴油轎車將超過 300 萬輛，約占柴油轎車的 83%。 、建議與對策 為了保護自然環(huán)境和國家資源，防止汽車尾氣對大氣環(huán)境的污染而引起公害，保障人民生命安全與健康。交通密度高，汽車尾氣的排放在某一時間又比較集中，散會引起該地區(qū)域在某一增 t 間內(nèi)，大氣污染的程度會急劇增加，危害人類的健康。尤其在大城市人口稠密的地區(qū)，開辟地下通道，同時可解決乘車難問題以及減少大氣環(huán)境污染。 開辟無車區(qū)。如何解決環(huán)境問題，在人類生存與自然資源的使用之間建立長遠而永續(xù)的關(guān)系，建立可持續(xù)發(fā)展的科學觀，已成為全人類日益關(guān)注的問題。 致 謝 : 時間匆匆而過，轉(zhuǎn)眼間美好而又充實的三年大學時光就著樣結(jié)束了，在這三年的大學生活中我得到了各位老師的細心指導以及在生活中給予的關(guān)心和幫助。t agree with the 14 disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. ation about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。s antiracism taskforce, is in London for the Football Association39。s 21 win. Michel Platini, president of European football39。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個人的時候，自己的想法總是特別地清晰。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強心劑，或者說，是自以為是的精神寄托罷了。 Have declared the end of the encounter that haven39。 instead of letting the world soften us, we let it drive us deeper into ourselves. We try to deflect the hurt and pain by pretending it doesn’t exist, but although we can try this all we want, in the end, we can’t hide from ourselves. We need to learn to open our hearts to the potentials of life and let the world soften us. 生活發(fā)生不幸時，我們常常會關(guān)上心門；世界不僅沒能慰藉我們，反倒使我們更加消沉。 Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness that’s unfolding in our lives, it gets stronger and more real. We take an emotion that’s fleeting and make it a solid event, instead of something that passes through us. 當生活中出現(xiàn)痛苦的事情時，別再逃跑或隱藏痛苦，試著擁抱它吧；當悲傷來襲時，試著深呼吸，然后直面它。其實，我們有能力面對這些痛苦的感受，從中領(lǐng)悟到出路。與其一味顧慮重重，不如從局外人的角度看待決策之事。t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there