A、 当在设定的周期内存在电子流,该电子流在设定的时间内重复,然后停止时,方波就会产生。
B、 方波是产生的,当有一段时间的电子流,停止一段时间,然后重复。
C、 当在设定的周期内存在电子流,该电子流在设定的时间内停止,然后重复时,方波就会产生。
答案：C
A、 当在设定的周期内存在电子流,该电子流在设定的时间内重复,然后停止时,方波就会产生。
B、 方波是产生的,当有一段时间的电子流,停止一段时间,然后重复。
C、 当在设定的周期内存在电子流,该电子流在设定的时间内停止,然后重复时,方波就会产生。
答案：C
A. OCCUR
B. FOUND
C. ARISE
A. Assemble the rotor according to the following program
B. Disassemble the rotor according to the following program
C. Disassemble the rotor in this sequence
A. Please stand near the moving surfaces.
B. Never stay near the removed surfaces.
C. Do not stay near the moving surfaces.
A. When you work with cleaning agents, use breathing equipment.
B. When you perform with cleaning agent,use breathing equipment
C. When you do work with cleaning agents, use breathing equipment.
A. ACCELERATES
B. AGGRAVATES
C. INCREASES
A. This system does not supervise the normal channels of communication for this item.
B. This system does not remove the normal channels of communication for this item.
C. This system does not supersede the normal channels of communication for this item.
A. When someone is working in a fuel tank you must stay next to the tank at all times.
B. When you do work in a fuel tank you must stay close to the tank at all times.
C. When one person does work in a fuel tank another person must be outside the tank at all times.
A. 检查流量控制管路,避免节流孔发生堵塞或被污染。
B. 检查节流孔,避免流量控制管路发生堵塞和出现污染物。
C. 检查流量控制孔,确保节流孔无堵塞和污染。
A. Check three licenses (Nationality Registration Certificate, Radio Operator＇s License,Airworthiness Certificate) are in place, good condition and effective.
B. Check three licenses (Airworthiness Certificate, Nationality Registration Certificate, Radio Operator＇s License) are in place, good condition and effective.
C. Check three licenses (Radio Operator＇s License,Airworthiness Certificate, Nationality Registration Certificate) are in place, good condition and effective.
A. 这些断流开关操作断流活门,断流活门是安定面配平控制模块的一部分,隔离到尾部的安定面配平组件的液压动力
B. 这些切断活门由切断电门操作,切断电门是安定面配平控制模块的一部分,将液压动力隔离到尾部的安定面配平组件
C. 这些由关闭电门操作的切断阀门可以作为稳定器配平控制模块的一部分,隔离流到尾部的稳定器配平组件的液压动力。
