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单项选择题


A．area
B．range
C．field
D．subject
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热门试题

单项选择题A．measuresB．measuredC．is measuredD．was measured

A．measures
B．measured
C．is measured
D．was measured

单项选择题A．valueB．ratioC．rateD．speed

A．value
B．ratio
C．rate
D．speed