A new bridge _______ across the river in Changsha and it is expected to open next year.

A. is built            B is being built       C. are built       D. has been built

亚急性感染性心内膜炎最常见的并发症是

A．心肌脓肿

B．心力衰竭

C．急性心肌梗死

D．肾脓肿

E．化脓性脑膜炎