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【单选题】
listen to the short conver sation and choose the best answer.A.
because most people were cell phone addicts and did not concertrate on their conversation.
B.
because most people were busy with their work and could not focus on their conversation.
C.
becasue most people were busy with their work and could not attend the party.
D.
because most people were using cell phones to keep contact with each other.
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【简答题】仿形法加工齿轮的齿形所使用的刀具又为( )铣刀切制齿轮和( )铣刀切制齿轮。
【简答题】样品预处理的目的和要求有哪些?
【单选题】关于《哈尔滨医科大学大庆校区学生请假制度》规定,下列说法错误的是( )。
A.
学生因病请假，需持校医务室或二级以上医院诊断书办理手续；
B.
病事假一天以内（含一天）由辅导员审批；
C.
病事假三天（含三天）由院系主管学生工作领导审批。
D.
法定节假日结束后不能按时返校不用办理请假手续。
【简答题】仿形法加工齿轮的齿形所使用的刀具又为( )铣刀切制齿轮和( )铣刀切制齿轮。
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