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2014年6月27日，在赤道几内亚首都马拉博召开第二十三届非洲联盟(非盟)首脑会议。本届会议主题是( )
A.
农业和粮食安全
B.
埃博拉病毒
C.
能源问题
D.
消除贫困
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【单选题】Mars Global Surveyor is the oldest of five NASA robotic devices, which is designed to find out signs that Mars once had water;and it had been taking detailed pictures of the red planet for a decade. U...
A.
its life
B.
its orbit
C.
its power
D.
its position
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【单选题】Mars Global Surveyor is the oldest of five NASA robotic devices, which is designed to find out signs that Mars once had water;and it had been taking detailed pictures of the red planet for a decade. U...
A.
its life
B.
its orbit
C.
its power
D.
its position
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