露天岩土开挖、二次破碎大块时采用的炮孔直径小于50mm，深度小于5m的爆破作业称为露

“人必自尊而人尊之，人必尊人而人尊之。”结合所学知识，回答下列问题。

（1）这句话说明了什么？

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（2）你准备怎样维护自尊？

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脏坚癖不止

设A="12345678"，则表达式Val(Left(A，4)+Mid(A，4，2))的值为( )。

A．123456

B．123445

C．8

D．6

(2009福州市高中毕业班第一次单科质量检查)There are altogether fifty-six students in our class,     is a new comer from a faraway mountain village.

A．the most hard-working of who

B．of whom the most hard-working

C．the most hard-working of them

D．but the most hard-working of whom

无邮票的集邮大型张及印有图画的首日封 ( )

A．33

B．32

C．34

D．30