Howcows are there?[ ] A. many B. old C._爱下问搜题

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问题选择题

How cows are there? [ ]

A. many

B. old

C. much

答案

答案：A

判断题

呼吸性碱中毒是指体内H+丢失或HCO3-增多所致。()

填空题

焊炬型号H01-6中“（）”表示射吸式。