津液的输布虽与五脏皆相关，但主要依赖于

A．肝脾肺三焦

B．肝脾肾三焦

C．肺脾肾肝三焦

D．肝肺肾三焦

______ exciting sport it is to climb the mountains!

A．How

B．What

C．What a

D．What an