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1. 什么是土的物理性质指标？哪些是直接测定的指标？哪些是计算指标？

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条件电极电位的大小反映了在外界影响下，氧化还原电对的实际氧化还原能力。

A. 对
B. 错

加入和氧化态产生副反应（配位反应或沉淀反应）的物质，使电对电极电位增加。

A. 对
B. 错

I have an _____ day.Many students kept looking up their Wechat in class.Two students are even playing video games on their phones.

A. ordinary
B. awful
C. wonderful
D. terrific

Whatqualities doyouthinkagoodfriendshouldhave？

A. Being honest
Being generous orhelpful
C. Being caring
D. All of the above.