潇洒xiāo sǎ
参考答案：
指行为自然大方，不呆板，不拘束，多用来形容神态和容貌，也指举止。
Beethoven was walking in the street _______ he heard someone ________ his music. [ ]
A. before, play
B. after, playing
C. when, playing
D. while, to play
腹部视诊包括哪些主要内容？
