【简答题】o 7 ÷[( 多 7 - 1 2 )× 2 o ].
【单选题】—How long have you been studying today? —_______. [ ]
【判断题】董仲舒以天人感应论为基础,对君臣、父子、夫妻之间的关系,做了全面系统的论证,并提出了仁、义、礼、智、信的“五常”之道。
【单选题】30高温奥氏体冷却过快,其中富含的碳来不及析出,形成碳在α铁中的过饱和固溶体,这种组织称为( )
【单选题】The old man was seen _______ in the park at 7:00 a.m. yesterday.