All people, ______ they are old or young, rich or poor, rich or poor, have been trying their best to

help those in need since the disaster.

[      ]

A. whatever

B. no matter

C. whether

D. however

根据中枢神经病变部位的不同，协调功能障碍可分为（）

A.小脑共济失调

B.脊髓后索共济失调

C.基底节共济失调

D.脊髓侧束共济失调

E.锥体束共济失调