肺动脉狭窄(pulmonarystenosis)是指肺动脉漏斗部、肺动脉瓣环、瓣膜、肺动脉主干、左右肺动脉狭窄。
参考答案：对
She tried to sleep, but thoughts and images flashed into her mind.
A．crowded out
B．crowed to
C．crowded of
D．crowded in
所有光源发出的光都是一样的。
