It is known to us all that the People’s Republic of China ______ on October 1, 1949.

A．was founded

B．was found

C．founded

D．is found

胸骨左缘第2～3肋间Ⅱ～Ⅲ级收缩期喷射性杂音，P₂亢进，固定分裂（）

A.房间隔缺损

B.室间隔缺损

C.动脉导管未闭

D.法洛四联症

E.病毒性心肌炎