题目内容

Li Hong didn’t agree. She said in winter, the weather could be much colder. Last winter, it was 5______________degrees below zero

A. three
B. six
C. seven

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for three 6 __________ and very windy.

A. weeks
B. days
C. months

呼吸道异物的种类

喉部异物的表现

气管异物的表现

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