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【简答题】
求由曲线 及直线 所围成的平面图形分别绕 轴和 轴旋转而成的旋转体的体积
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皮皮学刷刷变学霸
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【单选题】图示机构中,直角形杆 OAB 在图示位置的角速度为 w ,其转向为顺时针向。取小环 M 为动点,动系选为与直角形杆 OAB 固连,则以下四图中的动点速度平行四边形,哪一个是正确的( )
A.
B.
C.
D.
D
【简答题】The U.S. government has exerted great pressure on many Asian nations to ______.
【单选题】It implies in the passage that ______.
A.
the U.S. government has been helping Pakistan's economic development
B.
the U.S. approved Pakistan's detonating nuclear bomb
C.
the Pakistan government is corrupt
D.
the Pakistan government didn't pay much attention to family planning
【单选题】图示机构中，直角形杆OAB在图示位置的角速度为w，其转向为顺时针向。取小环M为动点，动系选为与直角形杆OAB固连，则以下四图中的动点速度平行四边形，哪一个是正确的（ ）【图片】
A.
A
B.
B
C.
C
D.
D
【单选题】The U.S. government has done a series of restrictions on the publication of academic papers.
A.
Y
B.
N
C.
NG
【简答题】In the mid-20th century, the U.S. government examined the possible impact of ______.
【单选题】When deciding between U.S. and British government securities, an American investor typically considers:
A.
U.S. and British interest rates and anticipated changes in the exchange rate
B.
Budget deficits of the U.S. government and British government
C.
Shifts in the demand for U.S. goods and British goods
D.
U.S. and British inflation rates and anticipated changes in the exchange rate
【单选题】The head of the executive branch of the U.S. Federal Government is .
A.
the President of the U.S.
B.
the Secretary of State
C.
the Chief Justice
D.
the Vice President of the U.S.
【单选题】图示机构中，直角形杆OAB在图示位置的角速度为ω，其转向为顺时针向。取小环M为动点，动系选为与直角形杆OAB固连，则以下四图中的动点速度平行四边形，哪一个是正确的（）
A.
A
B.
B
C.
C
D.
D
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