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问题 多项选择题

开关柜附件中，加热器、温湿度控制器运行异常，可采取什么检修原则？（）

A.计划安排B类检修

B.计划安排A类检修

C.及时安排B类检修

D.及时安排A类检修

答案

参考答案：C, D

选择题

河北省怀抱京、津，交通便和，下列铁路都经过河北省的一组是 [    ]

A．京九线、京沪线、大秦线

B．京包线、陇海线、京哈线

C．京广线、焦柳线、京哈线

D．宝成线、沪杭线、京通线

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单项选择题

Applications put computers to practical business (67) , but below the (68) it’s the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store (69) .
A traditional kernel provides all the functions for applications. The kernel (70) memory, I/0 devices and parcels out processor time.
The kernel also supports security and fault (71) , which is the ability to recover automatically when parts of the system fail.

A．earth

B．bottom

C．table

D．surface
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