单项选择题

The prevailing wind is the wind direction most often observed during a given time period. Wind speed is the rate at which the air moves past a stationary object.

A．motionless
B．massive
C．flexible
D．noticeable
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单项选择题
Australia began to assume its modem configuration by the Eocene Epoch, some 50 million years ago, when Antarctica broke away and drifted southward.
A．status
B．sphere
C．shape
D．situation
单项选择题
The Second Hague Disarmament Conference of 1907 was marked more by discord than discourse, a sign of the deteriorating world situation.
A．facilitating
B．upgrading
C．justifying
D．worsening
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