矿井应当分井、分水平设观测站进行涌水量的观测，每月次数不大于3次。
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在存货模式中，能够使现金短缺成本和固定转换成本之和保持最低的现金持有量，即为最佳现金持有量。
A. 正确
B. 错误
You are configuring a new Microsoft System Center Virtual Machine Manager （VMM） 2008 R2 environment to manage your existing virtual infrastructure. The existing infrastructure includes Windows Server 2008 R2 host servers and VMware ESX host servers. You need to add a VMware ESX host server named Host1 to your VMM environment. What should you do？（）
A. In the Computer name field of the Add VMware VirtualCenter server dialog box， type the fully qualified domain name （FQDN） of Host1.
B. In the Computer name field of the Add VMware VirtualCenter server dialog box， type the fully qualified domain name （FQDN） of the VMware VirtualCenter server that manages Host1.
C. In the Add Hosts wizard， select the VMware ESX Server host （any location） option. In the Computer name field， type the fully qualified domain name （FQDN） of Host1.
D. In the Add Hosts wizard， select the VMware ESX Server host （any location） option. In the Computer name field， type the fully qualified domain name （FQDN） of the VMware VirtualCenter server that manages Host1.
安设回柱绞车时（）安设信号系统。
A. 不得
B. 严禁
C. 必须
《电力工业企业档案分类规则》中科学技术研究类按（）和（）分类。
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