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【单选题】
高空作业许可证的有效期为作业项目一个周期,最长有效期不得超过( )天。当作业中断,再次作业前,应重新对环境条件和安全措施予以确认;当作业内容和环境条件变更时,需要重新办理许可证。A.
7
B.
2
C.
1
D.
3
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【简答题】Brian: Socially, like he said, it's, it's a lot of what you make it. Um, we don't have fraternities here, and so, you know, that's, it's obviously not as social. There's not as many parties as there w...
【单选题】下列有关继承的说法中正确的是
A.
子类能继承父类的所有方法和属性
B.
子类能继承父类的非私有方法和属性
C.
子类只能继承父类public方法和属性
D.
覆盖与重载是同一回事子类能继承父类的方法,而不是属性
【单选题】下列有关继承的说法。正确的是:
A.
子类能继承父类的所有方法和属性
B.
子类能继承父类的非私有方法和属性
C.
子类只能继承父类public方法和属性
D.
子类能继承父类的方法，而不是属性
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【单选题】P: Um,()? N: Yes, there is.
A.
is there a TV set in the ward.
B.
is there a book in the ward.
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