K2FeO444. Sn 45. CH3NCO 46. CH2=CH247. HCHO 48. Ar 49. Na5P3O1050. CFC 51. HCHO 52. C6H653. C6H5CH354. Rn 55. Ra 56. As57. Mo 58. W 59. CH3COOOH 60. OHCCH2CH2CH2CHO 61. KOH 62. Mg(OH)263. TiO2 O3臭氧,三原子形式的氧。常温、...
根据"first prize"和所给首字母w可知,这里是说"赢得"了一等奖,win赢",根据"in the 2021 National Spelling Bee"可知用一般过去时,win的过去式是won。故填:won。(2)remember 考查动词。句意:她每天努力记住大约13,000个单词的拼写。根据"the spelling of about 13.000 words per day"和所给...
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