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高中英语单选Scientists have created the world's smallest 'snowman'

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高中英语单选
Scientists have created the world's smallest 'snowman',( ) about a fifth of the width of a human hair.答案measuring ,说是ing短语做后置定语,我觉得是measured,因为这里改成定语从句的话就是which was measured.
高中英语单选Scientists have created the world's smallest 'snowman'
答案是measuring .
先学measure的用法:vi.度量(大小尺寸等等)为,后面接数量概念的词组.如:
The rope s 10 meters.这根绳子长10米.
The lake measures 130 by 80 kilometers.这条湖长一百三十公里宽八十公里.
然后再看这里的动词形式,不及物动词做非谓语时是不能用被动的,也就是不能用be measured.所以这里用measuring,做后置定语,等于定语从句which measures
类似用法的动词还有:weigh(重),如:
the stone weighing 15 tones,was carried away.那块15吨重石头被运走了.