胃壁分为黏膜、黏膜下层、肌层、浆膜等4层,其中黏膜层主要由下列哪几种细胞组成()。
A.主细胞
B.壁细胞
C.黏液细胞
D.B细胞
E.主细胞、壁细胞和黏液细胞
参考答案:E
It's said that he will __________his uncle's business when he is mature enough to deal with the
public relations.[ ]
A. take over
B. think over
C. hand over
D. go over
下列哪一项与淋巴 * * 状囊腺瘤无关?( )
A.实质均匀性低回声团块
B.形态尚规则,与周围组织分界清晰
C.无被膜轮廓线
D.后方回声无增强,亦无衰减
E.CDFI显示分支型血流分布,PSV〈60cm/s,RI0.55—0.80