题目内容

PLC系统确定I/O点数是要按实际I/O点数再向上附加__的备用量

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功能流程图的结构形式包括:步进入、__和步结束等三个部分

反弯点法各杆件弯矩为__,除底层外反弯点在__,底层在距柱底__处

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WhatisanEGC“ENID”?()

A. This identifies the vessel’s selective calling (selcall) number.
B. This number is used for receiving news and other optional services in FleetNET.
C. This is the INMARSAT number that is assigned to a unit for incoming calls.
D. This is the vessel’s INMARSAT registration number for accounting authority purposes

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