更多"[单选题] The Brazil Current flows in w"的相关试题:
[单选题]Which of the following underlined parts is different in pronunciation from the others?
A.I need double milk for my coffee.
B.We are proud to be Chinese.
C.The women shouted loudly for help.
D.They are going to buy a new house.
[单选题] The Benguela Current flows in a ______.
A. SW'ly direction along the NW coast of Africa
B. S'ly direction off the East Coast of Australia
C. NW'ly direction along the SW coast of Africa
D. SW'ly direction along the SE coast of Greenland
[单选题] The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．
A.Forming a cloud cover over the flames
B.Directing the gas at the base of the flames in a slow sweeping motion
C.Discharging the carbon dioxide into the heart of the flames
D.Bouncing the discharge off an adjacent bulkhead just above the burning surface
[单选题] If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens ________．
A.The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator
B.The transmission is not initiated and“ERROR”is indicated on the display readout
C.The transmission will be made with“default”information provided automatically
D.The receiving station will poll the DSC unit of the vessel in distress to download the necessary information
[多选题]AO、DI分别指的是（ ）
A.遥信DI，数字量输入
B.遥控DI，数字量输出
C.遥测AO，模拟量输入
D.人工置数AO，模拟量输出
[单选题] DO,DI的中文意思是( )。
A.开关量输入 开关量输出;
B. 开关量输出 开关量输入
C. 模拟量输入 模拟量输出
D. 模拟量输出 模拟量输入
[填空题]DI表示 ，DO表示 ，AI表示 ，AO表示
[单选题]AI、AO、DI、DO分别代表（ ）
A.模拟量输入、模拟量输出、数字量输入、数字量输出
B.模拟量输入、数字量输入、模拟量输出、数字量输出
C.模拟量输入、模拟量输出、数字量输出、数字量输入
D.模拟量输出、数字量输入、模拟量输入、数字量输出
[单选题] The three students _( )_ to help the disabled(残疾的)children at weekends.
A. interrupt
B. participate
C. allow
D. volunteer
[单选题]mdj＝1/10Di中mdj表示（ ）
A.第j个构件的砂浆贯入深度代表值（mm）
B.第j组立方体砂浆试件抗压强度平均值（mm）
C.第j个构件的砂浆抗压强度换算值
D.第j个测点的贯入深度测量表的不平整度读数
[单选题]拆卸氧气瓶前必须脱开（ ）
What compartments must be disengaged before when remove oxygen cylinders?
A.调节器和高压氧气过压软管
Regulator and the high pressure oxygen overvoltage hose
B.分配总管和调节器
Distribution manifold and regulator
C.分配总管，调节器和高压的氧气过压软管
Distribution manifold, regulator and the high pressure oxygen overvoltage hose.
[判断题]DI模块的功能是用来采集现场设备状态的信息反馈。
A.正确
B.错误
[判断题]智能监控单元GM-Mcon单元提供 DI、DO及AI接口。
A.正确
B.错误
[简答题]晶闸管的di/dt保护可采用串联___。
[单选题] Which international convention dealing with fire-fighting arrangements ect. ?
A. MARPOL
B. SOLAS
C. Load line convention
D. CRISTAL
[填空题]通用PLC的DI模块的通道数数量是 ，DO模块的通道数数量是
