安史之乱是唐朝由盛到衰的转折点是。
参考答案：对
Will you _______ us in a walk and did you _______ the school sports meeting yesterday? [ ]
A. take part in, join
B. join, take part in
C. have, join
D. join in, take part in
关于脊髓亚急性联合变性的临床表现错误的是（）
A.贫血
B.手套、袜套样感觉减退
C.Lhermitte征阳性
D.小脑性共济失调
