有关鳃裂囊肿的描述,正确的是()
A.为鳃沟或鳃囊闭合不全所致
B.T1WI呈高信号
C.T2WI为高信号
D.增强后囊壁无强化
E.继发感染则囊液信号增高
参考答案:A, C, E
妊娠呕吐伴神倦嗜卧者,宜加用()。
A.神门
B.气海
C.心俞
D.百会
E.风池
Like some of my classmates,I cannot live up to my teachers'expectations; ________I let them down. [ ]
A. in other words
B. after all
C. what's more
D. more or less