下列哪条血管闭塞最易导致偏瘫()。
A.小脑下后动脉
B.大脑中动脉
C.脊髓前动脉
D.小脑下前动脉
E.大脑前动脉
参考答案:B
— Oh,you haven’t read my e-mail?
—Sorry,I haven’t had any____ to the computer these days.
A.aids
B.basis
C.access
D.beliefs
影响利他行为的因素中,求助者经常表现出哪些特点?