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【单选题】
下面的铲土机的铲斗举升机构采用了( )实现铲斗平稳举升。A.
(A) 平行四边形机构
B.
(B) 反平行四边形机构
C.
(C) 双摇杆机构
D.
（D）曲柄摇杆机构
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举一反三
【单选题】What did the lady find when she went through the rooms?
A.
The things she possessed had been searched inside out.
B.
All the rooms had been covered with broken pieces.
C.
Some of the rooms were in a mess.
D.
Some of the rooms had not been touched.
【单选题】The color of rockets，shells，or rocket parachute flares used to indicate that the vessel is in distress and requires immediate assistance is ().
A.
white
B.
green
C.
red
D.
yellow
【单选题】According to paragraph 4, what is the relationship between solar flares and the eleven- year sunspot cycle?
A.
Solar flares are not related to the sunspot cycle.
B.
There is more flare activity at the maximum end of the cycle.
C.
There is more flare activity at the minimum end of the cycle.
D.
The sunspot cycle indicates where on the sun the solar flares will occur.
【单选题】在DOM对象模型中,history对象的哪个方法用于加载历史列表中的下一个URL页面:
A.
next()
B.
back()
C.
forward()
D.
go(-1)
【单选题】A company-specific information system that systematizes the information possessed by its employees and provides them with access to other employees who have the expertise to solve the problems is call...
A.
business-to-business network
B.
boundaryless organization
C.
knowledge management system
D.
network structure
【简答题】地方性风场包括 山谷风 、 海陆风 、
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