已知函数f(x)=14x4+x3-92x2+cx有三个极值点．（1）求c的取值范

个人接受外界信息后，在头脑中进行信息加工处理的过程可称为（）

A.人际传播

B.群体传播

C.大众传播

D.组织传播

E.自我传播

用Stock’s方程可以计算得到（）

A.三轴径

B.定方向径

C.筛分径

D.Stock’s径

氢氧化铝与其他的氢氧化物不同，既能与酸反应生成盐和水，又能与碱反应生成盐和水，试用离子方程式表示它与酸和碱反应的原理。

车辆年检的含义和目的是什么？

Virtualization is an approach to IT that pools and shares (71) so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human (72) are aligned around an application or business function. With a virtualized (73) , people, processes, and technology are focused on meeting service levels, (74) is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization (75) that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

（72）是（）

A.profits

B.costs

C.resources

D.powers