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100L水煤氣燃燒后共放出熱量1143.3kJ。
CO(g)+1/2 O2(g)=CO2(g);△H=-282.85kJ
H2(g)+1/2 O2(g)=H2O(l);△H=-285.8kJ
該水煤氣是由H2、N2、CO和CO2組成的混合氣體。通入60LO2中燃燒后得到65L氣體,再與NaOH溶液振蕩后體積變?yōu)?0L(以上體積均在標準狀況下測定)。這種水煤氣中各種氣體的體積是多少?
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It is often ______ that human beings are naturally equipped to speak.
A. said B. to say C. saying D. being said
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They use computers to keep the traffic _______ smoothly.
A. being run B. run C. to run D. running
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What I need is_____ book that contains ______ABC of oil painting.
A. a; 涓嶅~ B. the; 涓嶅~ C. the; an D. a ; the
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The children loved their day trip, and they enjoyed the horse ride ______.
A. most B. more C. less D. little
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They use computers to keep the traffic _______ smoothly.
A. being run B. run C. to run D. running
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I’m sure that your letter will get______ attention. They know you’re waiting for the reply.
A. continued B. immediate C. careful D. general
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It is often ______ that human beings are naturally equipped to speak.
A. said B. to say C. saying D. being said
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下列各組詞語中加點的字,讀音和書寫全都正確的一組是
A.商埠(bù) 稽(jī)私 亙(gèng)古及今 不落窠(kē)臼
B.花蕾(léi) 罹(lí)難 犖(1uò)犖大端 葦(wéi)編三絕
C.抽搐(chù) 戕(qiāng)害 畏葸(xǐ)不前 縱橫捭(bǎi)闔
D.糧囤(dùn) 栽臟(zāng) 聯(lián)袂(mèi)演出 喁(yú)喁私語
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下列詞語中讀音全都正確的一組是
A.鏗(kēng)鏘 休憩(qì) 愜(xiá)意 縱橫捭(bǎi)闔
B.輟(chuò)學 恪(gè)守 洞穴(xué) 未雨綢繆(móu)
C.雋(juàn)永 畸(jī)形 抓鬮(jiū) 櫛(zhì)風沐雨
D.塑(suò)造 折(shé)本 解剖(pōu) 饕(tāo)餮(tiè)
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