更多"[单选题] Swell is the rise and fall of"的相关试题:
[简答题]有一台变压器Sn=400kVA，月有功电量Wp={#X1#}kWh，月无功电量Wq={#X2#}kvarh。一个月按30天计算，则平均功率因数cos=____，变压器的利用率η=____%(用百分数表示)。(计算结果保留小数点后两位)
[计算题]将S1={#X1#}in2换算成平方厘米，已知公制换算系数K≈6.45，则S≈_____cm2。(计算结果保留两位小数)
[单选题]Air conditioning systems fall into two main classes and central systems.
A.individual unit systems
B.flexible unit systems
C.rotary unit systems
D.reciprocating unit systems
[多选题]The members of a diplomatic mission fall into such categories as:
A. the head of the mission.
B. the members of the diplomatic staff.
C. the members of the administrative and technical staff.
D. private servants.
[单选题]SU指令的作用是（ ）。
A.改变座位性质
B.锁定座位
C.释放座位
D.预留座位
[单选题] When you are on deck and see a man fall overboard, what should you do?
A. To shout ‘Man Overboard’ and throw a lifebuoy to the man in water.
B. To put on a lifebuoy and jump into the water to rescue the person in water.
C. To run to the bridge and keep a sharp lookout.
D. To inform the bridge and try to rescue the person in water.
[单选题] A chart with a scale of 1:80，000 would fall into the category of a ______．
A.sailing chart
B.general chart
C.coastal chart
D.harbor chart
[判断题]SU指令的可以把座位性质变为/。
A.正确
B.错误
[判断题]SU指令的可以把座位性质变为U。
A.正确
B.错误
[判断题]SU指令的可以把座位性质变为B。
A.正确
B.错误
[判断题]SU指令的可以把座位性质变为A。
A.正确
B.错误
[判断题]SU指令的可以把座位性质变为O。
A.正确
B.错误
[判断题]SU指令的可以把座位性质变为C。
A.正确
B.错误
[单选题]B-B -A-009 4 2 2
电源及机房环境监控系统 监控单元 SU 具有足够的数据处理能力,有一定数量的
( )、RS-485 或 RS-422 物理接口。
A.RS-232C
B.TTL
C.ECL
D.CMOS
[单选题][T]B-B-B-008 5 2 1
机房门禁系统与SU 的链接端口是()。
A.RS485 接口
B.以太网络接口
C.RS232 接口
D.模拟量接口
[单选题]B-B -A-009 4 2 2
电源及机房环境监控系统 监控单元SU具有足够的数据处理能力,有一定数量的( )、RS-485或RS-422物理接口。
A.RS-232C
B.TTL
C.ECL
D.CMOS
