单项选择题

A．The weather forecast is usually inaccurate.
B．The typhoon is already a real thing.
C．The weatherman used to be inaccurate in his forecast.
D．The meteorologists are always correct.
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单项选择题
According to the author, three design types of previous researches are _______.
A．interrelated to one another
B．supplementary to one another
C．to be modified considerably
D．to be integrated into one design
填空题
illustrations
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