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【参考答案】

in→at
介词错误。“以……的速度”应是at a speed of，所以应将in改为at。
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A．A method commonly used in research.B．A method of measuring obesity.C．A method of analyzing data.D．A method of measuring height.
A．A method commonly used in research.
B．A method of measuring obesity.
C．A method of analyzing data.
D．A method of measuring height.
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