— How about your weekend?

— Very boring. We could do nothing but ______ for the sky to clear up.

A．wait

B．waiting

C．to wait

D．to be waiting

减慢舒张期时心血管生理上有什么变化

A．左心室血液缓慢充盈到主动脉

B．心房缓慢被充盈

C．心房血液缓慢而最后全部充盈到左心室

D．心房血液快速充盈到左心室

E．左心房血液在舒时相的中期缓慢充盈到左心室