脊神经后根受损出现相应节段:()
A.各种感觉障碍
B.腱反射减弱或消失
C.根性痛
D.肌萎缩
E.肌无力
参考答案:A, B, C
Bill can swim, _______ he can't sing. [ ]
A. but
B. and
C. or
D. so
地质学