填表:
-Could you do me a favor?
-It depends on ______ it is. [ ]
A. which
B. whichever
C. what
D. whatever
由方形膜的下缘构成的韧带是()由方形膜的上缘构成的韧带是()由弹性圆锥游离缘增厚形成的韧带是()由弹性圆锥下方附着在环状软骨上缘中前部分构成的是()
A.杓会厌韧带
B.室韧带
C.声韧带
D.环甲膜
E.环气管韧带