皮皮学，免费搜题
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【判断题】
渗碳体是碳的化合物，分子式为Fe3C，其性能硬而脆。()A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】海关对公民、法人或其他组织的行政处罚,应当同其违法海关法行为的事实、性质、情节及危害程度相当,这一原则是海关行政处罚基本原则中的( )
A.
公正原则
B.
公开原则
C.
救济原则
D.
处罚与教育相结合原则
【单选题】She has been here for _______.
A.
two and a half months
B.
two and half a mouth
C.
two and half months
D.
two and a half month
【单选题】My classmate is from Sichuan. She regards Xiamen as her second ________ because she has been here for over ten years.
A.
family
B.
house
C.
home
【简答题】She has been here _______ 7 o'clock.
【单选题】She has been here for two weeks, _________?
A.
has she
B.
hasn't she
C.
does she
D.
doesn't she
【简答题】对正常建立好的进路,在 情况下以人工解锁方式来解锁进路。值班员办理好人工解锁手续后,首先进行 ,之后开始延时(对 进路延时3min,对 进路延时30s),延时结束后如果 则该进路将自动解锁。
相关题目：
【单选题】She has been here for two weeks, _________?
A.
has she
B.
hasn't she
C.
does she
D.
doesn't she