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【简答题】
（）和（）是风力发电机组的偏航系统所必须具有的主要功能。
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反馈参考答案：
举一反三
【单选题】根据领导者运用职权方式的不同,可以将领导方式分为专制、民主与放任三种类型。其中民主式领导方式的主要优点是( )
A.
纪律严格，管理规范，赏罚分明
B.
组织成员具有高度的独立自主性
C.
按规章管理，领导者不运用权力
D.
员工关系融洽，工作积极负责，富有创造性
【单选题】Before the sludge in a purifier is ejected,
A.
the oil feeding is stopped and replaced by admitting flushing water
B.
the flushing water feeding is stopped and replaced by admitting oil
C.
the feeding of dirty oil and flushing water is stopped
D.
the feeding of dirty oil and flushing water is admitted
【单选题】Which is right ?
A.
Put the lid down before flushing the toilet.
B.
Close window
C.
Use central air-conditioning at office
D.
Abandon your pets as they may spread virus
【单选题】What are residents advised to do?
A.
Let the water flow from the tap before using it
B.
Fill containers with fresh water prior to the flushing
C.
Report any discoloration or other problems immediately
D.
Boil the tape water for at least one minute before drinking it
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