白居易生活和创作的社会背景是( )
A．经历了唐由盛而衰的变迁
B．遭遇安史之乱的颠沛流离
C．逢藩镇割据战乱
D．受唐末农民战争冲击
参考答案：C
Whenever she heard that someone had trouble, she would go to ________.[ ]
A. find out
B. work out
C. carry out
D. help out
颈深上淋巴结收集（）。
A.鼻咽部淋巴
B.腭扁桃体淋巴
C.舌部淋巴
D.颏下淋巴
E.颌下淋巴
