题目内容

12. any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

查看答案

搜索结果不匹配？点我反馈

更多问题

13. a condition caused by blocking the airways to the lungs (as with food or swelling of the larynx)

14. a sudden unforeseen crisis (usually involving danger) that requires immediate action

15. an emergency procedure to help someone who is choking because food is lodged in the trachea

工作在放大状态的晶体管,流过发射结的主要是(),流过集电结的是()。

A.扩散电流
B.漂移电流