单项选择题

A．The strength of ocean currents.
B．The movement of sediment deep in the ocean.
C．A new way of measuring the depth of the ocean.
D．The best methods for studying deep ocean processes.
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单项选择题
A．At a concert.B．In a museum.C．In a movie theater.D．At a dinner party.
A．At a concert.
B．In a museum.
C．In a movie theater.
D．At a dinner party.
单项选择题
A．outB．throughC．awayD．off
A．out
B．through
C．away
D．off
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