单项选择题

A．gathered
B．speeded
C．worked
D．picked
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单项选择题
A．meansB．methodC．mediumD．measure
A．means
B．method
C．medium
D．measure
问答题
This is hardly surprising when one considers the changeable nature of the sea where, even today, with sophisticated weather forecasting techniques a sudden storm can blow up quite unexpectedly.
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