【判断题】【消耗次数:1】
纯铁在室温下的晶体结构为面心立方晶格。
正确
错误
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相关题目
【多选题】 面心立方晶格的结构的材料有()。
①  A.金
②  B.银
③  C.铝
④  D.铜
【判断题】 马氏体的晶体结构和铁素体的相同。
①  正确
②  错误
【判断题】 本征半导体的晶体结构为正四面体。
①  正确
②  错误
【判断题】 面心立方金属的塑性比体心立方金属的好。
①  正确
②  错误
【判断题】 白口铸铁在室温下的相组成都为铁素体和渗碳体。
①  正确
②  错误
【单选题】 纯净、不含杂质的单晶体结构的半导体,叫本征半导体。
① 
② 
【判断题】 解理通常平行于晶体结构中相邻质点间联结力弱的方向发生。
①  正确
②  错误
【单选题】 下列有关纯铁的描述正确的是( )。
①  与相同浓度的盐酸反应生成氢气的速率比生铁的快
②  熔点比生铁的低
③  在冷的浓硫酸中可钝化
④  在潮湿空气中比生铁容易被腐蚀
【单选题】 共析钢在常温下的晶体组织为( )。
①  铁素体和珠光体
②  珠光体
③  珠光体和渗碳体
④  奥氏体
【单选题】 下列各结构面为原生结构面的是( )。
①  片理面
②  断层面
③  节理面
④  卸荷裂隙面
随机题目
【单选题】 My mother is no ______ young.
①  shorter
②  longer
③  little
④  few
【单选题】 I think science is ______ than Japanese.
①  much important
②  important
③  much more important
④  more much important
【单选题】 What ___ if I drink this?
①  happens
②  is happening
③  will happen
④  is happened
【单选题】 She ___ the door before she goes away.
①  had locked
②  is locking
③  has locked
④  was locking
【单选题】 I haven’t finished my composition. I ___ for two hours and a half.
①  ?have written it
②  ?have been writing it
③  ?wrote it
④  am writing it
【单选题】 Look out! That tree ___ fall down.
①  is going to
②  will be
③  shall
④  would
【单选题】 My uncle ___ to see me. He’ll be here soon.
①  comes
②  is coming
③  had come
④  came
【单选题】 Helen believes if a man robs her of five dollars it is the same as if he _____ a hundred.
①  takes
②  will take
③  took
④  has taken
【单选题】 When I saw Mary, she ___ on the piano.
①  is playing
②  plays
③  was playing
④  played
【单选题】 Which sentence is right?
①  I dont think that he is not right.
②  I think he is not right.
③  I dont think that he is right.
④  I think he was not right.