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發表於:2019-09-01
問題詳情:某些化學鍵的鍵能如下表所示(單位kJ·mol-1):H-HBr-BrI-ICl-ClH-ClH-IH-Br鍵能436.0193.7152.7242.7431.8298.7366(1)1molH2在2molCl2中燃燒,放出的熱量爲_______________kJ。(2)在一定...
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發表於:2019-12-31
問題詳情:讀下列材料,回答問題。(28分)材料一巴西、俄羅斯、印度、*、南非五國的英文名稱的首字母合起來寫爲“BRICS”,五國被稱爲“金磚國家”。2013年3月26日至27日,金磚國家領導人第五...
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發表於:2018-01-19
ThehardwaredesignforanISDNmultiBRIdeviceRESEARCHONSTRUCTURALSIMULATIONANALYSISFORENTIREBRIDGEOFLONG-SPANSTONEARCHBRIDGEBRIserviceisprovidedoveralocalcopperloopthattraditi...
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發表於:2021-08-03
問題詳情: 用所給詞的適當形式填空1.Thesupermarketison(five)Avenue.2.BridgeStreetisagoodplace(have)fun.3.Go(cross)theroad,you’llfindthesupermarketeasily.4.Youcanfindthesup...
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發表於:2019-06-06
問題詳情:EnglishisspokenasafirstlanguagebymostpeopleintheUSA,Britain,Australia,NewZealand,IrelandandCanada.However, 1 .Itisthemainlanguageinover60countries,includingIndi...