A、 Because of the speed of the AC, the magnetic fields and electric fields created around the emission do not have time to completely collapse as the AC cycles;
B、 Because of the speed of the AC, the electromagnetic fields and electric fields created around the antenna do not have time to completely collapse as the AC cycles;
C、 Because of the speed of the DC, the electromagnetic fields and electric fields created around the antenna do not have time to completely collapse as the DC cycles;
答案：B
A、 Because of the speed of the AC, the magnetic fields and electric fields created around the emission do not have time to completely collapse as the AC cycles;
B、 Because of the speed of the AC, the electromagnetic fields and electric fields created around the antenna do not have time to completely collapse as the AC cycles;
C、 Because of the speed of the DC, the electromagnetic fields and electric fields created around the antenna do not have time to completely collapse as the DC cycles;
答案：B
A. If the part is broken, replace it.
B. If the part is unserviceable, replace it.
C. If the part condition is poor replace the.
A. Circuit breaker is a device which opens an electrical circuit when an excess of voltage.
B. Circuit breaker can be reset after the fault fixed.
C. Circuit breaker is no more serviceable and needs to be replaced at once after an excess of current flows that causes it open.
A. This shows that a backup relay may be installed;
B. This indicates that an additional relay may be installed;
C. This shows that an ordinary relay may be installed;
A. 当朝下时,盖子起到保护开关的作用
B. 当朝下时,盖子作为开关的一种保护
C. 当打开时,盖子就起到保护开关的作用
A. You do not need to give the return processes in its entirety unless you need to comprehend the system.
B. Unless you need to comprehend the system，do not need to fully show the return lines.
C. Return lines need not be shown completely if the system need not be realized.
A. 拆装部件时,不要让零件掉落。如果他们掉落,可能导致永久损伤。
B. 组装部件时,不要让零件掉落。如果他们掉落,可能导致显著的损伤
C. 组装部件时,不要让零件掉落。如果他们掉落,可能导致永久的损伤
A. 当控制手柄到 DN 位时,齿轮箱壳体会打开,齿轮松开并退出,壳体关闭。
B. 当控制手柄处于 DN 位置时,起落架舱门会打开,起落架解锁并伸出,然后舱门关闭。
C. 将控制手柄推到 DN 位置时,货舱门将打开,传动装置解锁可用,收回后则关闭。
A. 若发现一个或多个叶片损伤,在发动机记录本中记录
B. 若仅缺少一个叶片,无需在发动机记录本中记录
C. 若缺少一个或多个叶片,在发动机记录本中记录
A. That portion of the system which compares navigational information to compute the aircraft＇s geographical location. Includes items such as course computers, etc.
B. That portion of the system which combines navigational information to compute the aircraft＇s geographical location. Includes items such as course computers, etc.
C. That portion of the system which combines navigational information to compute the aircraft＇s reference location. Includes items such as course computers, etc.
A. The center of the circuit gravity moves by the loads on the aileron.
B. The center of gravity moves in relation to the loads on the wings.
C. The center of gravity moves along with the weight on the flaps.
