单项选择题

A．on
B．through
C．with
D．of
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单项选择题
A．valueB．ratioC．rateD．speed
A．value
B．ratio
C．rate
D．speed
单项选择题
A．measuresB．measuredC．is measuredD．was measured
A．measures
B．measured
C．is measured
D．was measured
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