Henry has been looking forward to ________ his present for days, so now all that he’s looking

forward to is ________ whether his father is back home.

A．see; seeing

B．seeing; seeing

C．seeing; see

D．see; see

红细胞缓冲系统中不包括（）

A.碳酸氢钾/碳酸

B.磷酸氢二钾/磷酸二氢钾

C.蛋白质钠盐/蛋白质

D.血红蛋白钾盐/血红蛋白

E.氧合血红蛋白钾盐/氧合血红蛋白