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【单选题】
Modern Architecture Around the World After World War II The Illinois Arts Council is pleased to announce the schedule of this year' s Modern Architecture Lecture Series. This year' s series of lectures will feature a variety of architects from all over the nation and will focus on how modern architecture serves residents of urban environments. The lecture will be held in the Stone Auditorium on the second Tuesday of every month from 6 p.m. to-8 p.m. A question-and-answer session will follow the lecture. Details of each lecture can be obtained at our web site www.state. il.org, and those who wish to attend the lectures are advised to contact the Stone Auditorium box office on weekdays from 10 a.m. to 5 p.m. to make reservations and pick up tickets. Box Office phone: 401-651-4727 Manager's phone: 401-651-4268 What is the subject of the lecture?
A.
Today' s architects and architecture
B.
The comparison of the old and new construction methods
C.
The decline of construction work in Illinois
D.
The change of construction material
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【单选题】化简 4 cos 2 α cot α 2 -tan α 2 =(  )
A.
1 2 sinαcosα
B.
sin2α
C.
-sin2α
D.
2sin2α
【单选题】化简: 2sin2α 1+cos2α ? cos 2 α cos2α =(  )
A.
tanα
B.
tan2α
C.
sin2α
D.
cos2α
【单选题】按照《中华人民共和国地表水环境质量标准》,依据地表水水城环境功能和保护目标,我国水质按功能高低依次分为( )类。
A.
B.
C.
D.
【单选题】化简式子 2+2cos1 -sin 2 1 + 2-2sin1 -cos 2 1 + 1-2sin1cos1 的结果为(  )
A.
2(1+cos1-sin1)
B.
2(1+sin1-cos1)
C.
2
D.
2(sin1+cos1-1)
【单选题】化简 co s 2 ( π 4 -α)-si n 2 ( π 4 -α) 得到(  )
A.
-cos2α
B.
-sin2α
C.
cos2α
D.
sin2α
【单选题】化简cos(α+β)?cosβ+sin(α+β)?sinβ为(  )
A.
cos(α+2β)
B.
cosα
C.
sinα
D.
sin(α+2β)
【单选题】氧传感器的工作温度
A.
200以上
B.
400以上
C.
600以上
D.
800以上
【单选题】化简 1+2sin(π-2)?cos(π-2) 得(  )
A.
sin2+cos2
B.
cos2-sin2
C.
sin2-cos2
D.
±cos2-sin2
【单选题】()不属于直流电机。
A.
永磁式有刷电动机
B.
无铁芯电动机
C.
串励电动机
D.
超声波电动机
【单选题】化简: 2+cos4- sin 2 2 得(  )
A.
sin2
B.
3 sin2
C.
-cos2
D.
- 3 cos2
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