对开三通（对开四通）安装时需找（）水平方向。 A、管线轴向 。 B、管线纵向 。 C、与管线45度 。 D、与管线垂直。
While installing the equipment for a new two-node cluster， it is discovered that the disk subsystem Rack has one connection to the power mains. The explanation given was that the disks are to be mirrored between the two disk drawers in the rack and that a failure in either of the disk drawers would simply result in half of the disk being lost. What can be done to avoid a single point of failure？（） Customize HACMP to overcome quorum issues.。 Add a second PDU to separate the power connections.。 Use RAID5 when implementing two IO racks in a HACMP environment.。 Add another shared disk to each volume group to avoid quorum issues during fallover.。
近代中国城市发展由哪些特点？
结合实例，试述餐饮企业实施关系营销的策略。
硝酸甘油不具有下列那种作用（） 扩张容量血管。 减慢心率。 增加缺血区血流量。 扩张脑膜血管引起头痛。 增高眼内压。
Which of the following supports the XML data type?（）
