单项选择题

Deneb is found in what constellation?（）

A.Cygnus
B.Pegasus
C.Ursa Major
D.Andromeda

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单项选择题

A.Maritime Safety Information
B.Maritime Shipping Index
C.Maritime Satellite Indicator
D.Mariner Safety Intelligence

单项选择题

A.litmus paper
B.combustible gas indicator
C.oxygen breathing apparatus
D.oxygen indicator

单项选择题

A.longitudinally
B.vertically
C.transversely
D.intermittently