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【判断题】
科学最突出的特点是理论和观察之间的相互支持关系。A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
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【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】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】— 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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