建筑企业对行政处罚结果不服，提请行政复议，如不服行政复议决定，则()。A.不可以提起

关于蛋白质二级结构的叙述正确的是指

A．氨基酸的排列顺序

B．每一氨基酸侧链的空间构象

C．局部主链的空间构象

D．亚基间相对的空间位置

E．每一原子的相对空间位里

影响空气斜槽输送物料的主要原因（）

A、风机振动情况

B、底部充气室积灰

C、斜槽外壳是否有破洞

A procurement audit is a structured review of the procurement process from procurement planning through contract administration．What is the primary objective of a procurement audit ？（）

A．Determine the issues with your present contract so that the contract terms can be modified or improve

B．Identify successes and failures that warrant transfer to other procurement items on this project or to other projects within the performing organizatio

C．To ensure that the seller is following all the terms listed in the contrac

D．To ensure that the buyer is following all the terms listed in the contrac

平衡容器或容器上部形成参比水柱的管路（）；引到差压变送器的两根取样管应平行敷设共同保温。

氧气顶吹转炉炼钢炉渣是碱性氧化渣，渣中（）含量最高。

A.FeO

B.MgO

C.SiO₂

D.CO