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【判断题】
激光打印机的常用耗材是和纸张。
A.
正确
B.
错误
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参考答案:
举一反三
【判断题】金属受到污染后可能引起加工时出现脆性或裂纹,在回用料、焊料中带入微量的铅就会使合金材料受到污染,其它的脆性污染物包括硅、硫和其它低熔点金属,要注意回用料的管理,成分不明确的材料不能随便使用,要先进行分析,检查有无这样的杂质。
A.
正确
B.
错误
【简答题】 第二节 (共 5 小题;每小题 2 分,满分 10 分) 根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 What does it take to be successful? Many books have been written about the secrets of success. ____16____ Four key qualities st...
【单选题】关于三极管的结构特点,以下说法不正确的为( B )
A.
基区很薄
B.
基区掺杂浓度最高
C.
发射区掺杂浓度最高
D.
发射结的结面积小于集电结的结面积
【单选题】听力原文: The home is the central focus of most young people's lives in Britain, particularly for those who are still attending school. The majority rely upon their home environment as a place of security...
A.
At school.
B.
At home.
C.
At Youth Clubs.
D.
At Youth Centers.
【单选题】听力原文: The home is the central focus of most young people's lives in Britain, particularly for those who are still attending school. The majority rely upon their home environment as a place of security...
A.
At school.
B.
At home.
C.
At Youth Clubs.
D.
At Youth Centers.
【单选题】关于三极管的结构特点,以下说法不正确的为( )
A.
基区很薄
B.
基区掺杂浓度最高
C.
发射区掺杂浓度最高
D.
发射结的结面积小于集电结的结面积
【单选题】一般初产妇开始自觉胎动的时间是在妊娠的:
A.
第12-15周
B.
第16-20周
C.
第22-24周
D.
第25-26周
【单选题】— Is there anything special you'd like for dinner? — No, nothing in _____. [     ]
A.
theory
B.
particular
C.
common
D.
practice
【单选题】听力原文: The home is the central focus of most young people's lives in Britain, particularly for those who are still attending school. The majority rely upon their home environment as a place of security...
A.
Youth clubs.
B.
Service groups.
C.
Voluntary organizations.
D.
Homes.
【简答题】 The qualities that truly ___ Winston Churchill _____ were his determination and his ability to inspire others.
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