“套环征”是指()
A.多房脓肿的壁互相套叠
B.肿瘤多中心坏死
C.脑室壁的强化
D.多发转移癌
E.脑池壁的不均匀强化
参考答案:A
There is _____ in the newspaper.
A.anything new
B.new anything
C.something new
D.new something
后金社会主要由满族、汉族、蒙古族和女真族几种人组成。