问题描述:
33.Paper produced every year is __ the world's production of vehicles.
a.the three times weight of
b.three times the weight of
c.as three times heavy as
d.three times as heavier
选什么,为什么
a.the three times weight of
b.three times the weight of
c.as three times heavy as
d.three times as heavier
选什么,为什么
问题解答:
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