网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
单选题
在甚高频无线电话机中,为了提高调制频率高频段的信噪比和抗干扰能力,发射机部分设置了()。
A
自动增益控制电路
B
自动频率控制电路
C
预加重电路
D
语音扩展器
参考答案
参考解析
解析:
暂无解析
更多 “单选题在甚高频无线电话机中,为了提高调制频率高频段的信噪比和抗干扰能力,发射机部分设置了()。A 自动增益控制电路B 自动频率控制电路C 预加重电路D 语音扩展器” 相关考题
考题
单选题下列()参数属于流体的物理性质。A
表面张力,膨胀性,流量,含气量B
表面张力,含气量,压强,膨胀性C
表面张力,膨胀性,流量,空气分离压D
表面张力,含气量,膨胀性,空气分离压
考题
单选题土产格式;合同范本要求,在交船时,()。 Ⅰ.船体应紧密、坚实、牢固; Ⅱ.货舱须打扫干净; Ⅲ.船舶应做好接受货物的准备; Ⅳ.船舶在各个方面适合于普通货物的运输。A
Ⅱ,ⅣB
Ⅰ,ⅢC
Ⅰ~ⅣD
Ⅰ,Ⅱ,Ⅳ
考题
单选题As in the case of a voyage charter-party,it is implied in all bills of lading that()will be made from the contractual route unless such deviation is justified.A
deviationB
no deviationC
navigationD
no navigation
考题
单选题You are on a multiple product tanker and carrying methyl acrylate,diethanolamine,and triethylamine. Which statement is TRUE? ()A
Methyl acrylate may be loaded in a tank adjacent to diethanolamine but not triethylamineB
The heating coils to the cargo tank loaded with methyl acrylate must be blanked offC
Valve components made of aluminum,copper,or zinc may not be in contact with the cargoesD
Each crew member working on deck must have an emergency escape breathing apparatus
考题
单选题下列各项中:Ⅰ.柱塞直径、Ⅱ.柱塞长度、Ⅲ.柱塞个数、Ⅳ.油缸分布圆直径、Ⅴ.斜盘倾角、Ⅵ.缸体摆角、Ⅶ.转速,会影响斜盘泵排量的是()。A
Ⅰ、Ⅱ、Ⅲ、ⅤB
Ⅰ、Ⅱ、Ⅲ、Ⅳ、ⅤC
Ⅰ、Ⅲ、Ⅳ、ⅤD
Ⅰ、Ⅲ、Ⅳ、Ⅴ、Ⅶ
考题
单选题某集装箱船仅适合装20ft集装箱的箱位有7800个,仅适合装40ft集装箱的箱位有350个,20ft与40ft集装箱均能装的箱位2020个,冷藏箱箱位有240个,则该轮最多可装载40ft集装箱多少个。()A
350B
1360C
1575D
740
考题
单选题According to regulations,access to a cargo pumproom in a tank vessel carrying grades C or D liquid cargo shall be().A
from areas equipped with power ventilationB
only from enclosed areas free from sources of vapor ignitionC
from the open deckD
from within the vessel
考题
问答题锅炉大都有哪些附件?各自的作用是什么?
热门标签
最新试卷