腰腿痛与下述哪一韧带的变化之间关系最为密切()
A.棘间韧带
B.黄韧带和后纵韧带
C.棘上韧带和棘间韧带
D.黄韧带和棘间韧带
E.黄韧带和前纵韧带
参考答案:B
阻碍个人进行有效决策的因素中,经济衰退属于()因素。
It keeps raining these days. We doubt _______ the sports meeting will take place as planned.
A.which
B.that
C.whether
D.when