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【单选题】
火灾自动报警系统属于( )?
A.
动力系统
B.
弱电系统
C.
照明系统
D.
通信系统
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参考答案:
举一反三
【单选题】千里船的发明者是?
A.
苏颂
B.
张衡
C.
祖冲之
【单选题】The angle between the flukes and the shank of an anchor is called the ______.
A.
holding angle
B.
fleet angle
C.
fluke angle
D.
shank angle
【判断题】日常生活及生产实践中所接触到的电路大多数为正弦交流电路。
A.
正确
B.
错误
【单选题】The angle between the limiting positions is the angle between ( )
A.
the corresponding positions of the cranks when the rocker is located in the two extreme posi­tions
B.
the two extreme positions of the coupler
C.
the direction of the static force transferred through the coupler and absolute velocity of the output link at the connected point
【单选题】The pressure angle is the angle between .
A.
the coupler and the output link
B.
the two extreme positions of the coupler
C.
the direction of the static force transferred through the coupler and absolute   velocity of the output link at the connected point
【单选题】______is an angle at which a cargo settles in the hold of a ship,between the horizontal and the slope made by a bulk cargo such as grain or iron ore.
A.
Angle of loll
B.
Angle of inclination
C.
Angle of repose
D.
Angle of list
【单选题】________is the angle between relative wind and the chord.
A.
Angle of incidence
B.
Angle of Attack
C.
Angle of anhedral
【单选题】_________ is the angle between the airplane longitudinal reference and the horizontal plane.
A.
Angle of incidence
B.
Angle of attack
C.
Bank angle
D.
Pitch angle
【单选题】2018年中央一号文件提出,保持土地承包关系稳定并长久不变,第二轮土地承包到期后再延长_____年。
A.
20
B.
30
C.
40
D.
50
【单选题】材料六 五千年中华文明成就辉煌,但在一定的条件下,也会成为中国向前发展的包袱。先民修筑了万里长城,抵御了北方游牧民族的侵扰,但也限制了自己的视野和对外交往。先民开凿了大运河,沟通了中国南北,但这对于封建统治者来说,主要是为了加强中央集权,满足了专制者游玩的需要。运河往来最多的是官吏们的游船和运送皇粮的漕船。中国拥有“四大发明”,这固然是中华民族的奇迹和骄傲,但是罗盘针可以导航亦可看风水;火药可以制...
A.
整体思维
B.
类比思维
C.
辩证思维
D.
抽象思维
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