Waves of red light are about twice as long as _______ of blue light.A．thoseB．th_刷题宝

题干

Waves of red light are about twice as long as _______ of blue light.

A．those

B．that

C．it

D．Ones

上一题下一题 0.64难度单项选择更新时间:2014-03-10 04:48:23

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