给音节补充声母。
ù ǐ ǎ
趣 底 洒
ī óu ____ǎo
滴 油 草
q d s
d y c
The lecture was called off five minutes before it was supposed to start, ________made the audience
angry. [ ]
A. what
B. that
C. when
D. which
室间隔缺损的血流动力学改变是
A．左心室增大
B．左心房增大
C．右心室增大
D．右心房增大
E．肺动脉高压
