自行车下坡时，不踏脚踏板，速度越来越快，这是由于_________做功的缘故。这时有_________能转化为__________能。
重力；重力势； 动
The reason he was absent from class was his mother fell ill this morning.
A．for; that
B．why; that
C．for; because
D．why; because
病历摘要：支气管扩张患者，女性，40岁，反复咳嗽、咯血半年余入院。查体：左下肺呼吸音粗，可闻及少许湿啰音。心脏体查无异常。做胸部CT平扫。
1.诊断是什么？
