在爆炸危险场所，对接地装置的要求是（）。
A.除生产上有特殊要求的以外，一般场所不要求接地（或接零）的部分仍应接地（或接零）
B.设备的接地（或接零），不必要连接成整体
C.单相设备的工作零线应与保护零线分开，相线和工作零线均应装设短路保护装置，并装设双极闸刀开关以同时操作相线和工作零线
D.接地干线在爆炸危险区域、不同方向应不少于两处与接地体连接
参考答案：A, C, D
| 35．Applications put computers to pratical business (1) , but below the (2) it’s the heart of an operating system—the kernel that provides the technical wizardry to juggle multiple program, connect to networks and store (3) . A traditional kernal provides all the functions for applications. The kemal (4) memory, I/O devices and parcels out processor time. The kernel also supports security and fault (5) , which is the ablity to recover automatically when parts of the system fail. |
(4)
A．off
B．offer
C．office
D．officer