A person’s blood flows through a pipeline of vessels that’, end to end, would st

游客2023-10-17  23

问题 A person’s blood flows through a pipeline of vessels that’, end to end, would stretch more than______half times around the Earth at the equator.

选项 A、twice as
B、two and
C、twice and
D、two and a

答案 D

解析 分析句意,空格处需要表达的是血管长度与地球赤道长度的关系。表达倍数可以有几种表达方式,一是倍数+as+形容词或副词原级+as,表示“……是……倍”,二是倍数+形容词或副词比较级+than,表示“……比……大几倍”。空格之后为half times,与twice(两倍)语意重复,故排除AC两项。half表示半数,之前需要加不定冠词。故选D。
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