Green economy offers a new model _____ people could both protect the climate and develop the economy, according to what Li said at the International Conference.

A．that

B．why

C．where

D．which

血pH的决定因素为()

A．血中的HCO

B．血中的PCO

C．血中的HCO

D．血中的Na、K及Ca

E．血中的HCO/HCO