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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
【单选题】英版《潮汐表》的 “ 潮流预报表 ” 中,往复流给出 。 I 、转流时间; II 、最大流速; III 、最大流速时间; IV 、流向; V 、预报位置; VI 、包括海流
A.
I ～ V
B.
I ～ VI
C.
I ～ III
D.
I ～ III ， V