焊接式对开三通在进行纵向焊缝焊接时，三通与管子之间（） A、焊接 。 B、不允许焊接 。 C、部分焊接 。 D、只点焊四角。
mainframe customer would like to receive a proposal for a mainframe storage system with 120 TB raw capacity. The mainframe server load is not too high， and they need hard disk drives with the lowest possible power consumption to keep operating costs low. The customer will not increase the capacity of their mainframe applications in the future but rather invest later into their System p servers. Which of the following solutions best meets these requirements at the lowest cost（） offer a DS8700 system with 600 GB FC drives。 offer a DS8800 system with standard cabling and 600 GB SAS drives。 offer a DS8800 system with business class cabling and 600 GB SAS drives。 offer a DS8800 system with SATA drive。
鉴别培养基
测评时系统应具备什么条件（） 系统连续运行不少于15天。 提供运行管理文件。 提供施工纪录文件。 系统应调试完成并自检合格。
农村经济决策中，对确定型决策来说，一个方案只有（）结果。 一个。 两个。 三个。 多个。
下列关于行为主义学习论表述正确的是（）
