The money he has contributed in the past years to ______ the disabled is now considered to be of great value.

A．help

B．helping,

C．having helped

D．being helped

在应激状态能快速发挥升高血糖作用的激素是（）

A.肾上腺素

B.胰高血糖素

C.生长素

D.甲状腺素

E.胰岛素