It was not until all the milu deer ________ that we realized we should build a natural park to protect them.

A．died off

B．died away

C．died out

D．died down

推拿治疗哮喘的总原则为：

A．补肾纳气

B．宽胸理气

C．化痰理气

D．除湿理气

E．和中益气