瓦斯爆炸的三个条件是：一是浓度______ 的瓦斯;二是温度为______ 以上引爆火源;三是空气中氧浓度______ 。
5%～ 16%、 650℃～ 750℃、 不低于 12%
暂无解析
翻译：ChinamaywellbethefavoritewhippingboyofmanufacturersintheUnitedStatesthesedays.Butinthedevelopingworld,thecountryisbecomingthetradingpartnerofchoice,drawinginairplanesfromBrazil,soybeansfromArgentinaandseafoodfromMalaysia,boostingeconomiesandleadingtonewpoliticalalliances.Thegrowingappetiteoftheworld’mostspopulousnationhasmadeChinaanewsourceofincomeforthedevelopingeconomiesofSouthAmericaandAsia.“China’sboomingimportsfromdevelopingcountriesespeciallyofcommodities——arenotonlyhelpinggrowthincountriesfromBraziltoAfrica,butarealreadyreshapinginternationaltraderelations,”saidKennethRogoff,aneconomicsprofessoratHarvardUniversity.DevelopedcountriesalsoaresendingmoregoodstoChins,theworld-largesteconomy,withanestimated’ssixth$1.334trilliongrossdomesticproductin2003,accordingtotheIMF.
英语翻译：你为什么把失败视为当然呢?
When_______,waterwillbeturnedintosteam.
句子写作：Thejudgehadahardtimedeciding___________________.
Havingdecidedtorentaflat,we________contactinghousingagenciesinthecity.
