绿色开花植物在完成受精作用后,所形成的受精卵将发育成[ ]
A.种子
B.种子的胚
C.果皮
D.果实
答案:B
— Mom, I haven't seen my aunt for a long time.
— ______________ [ ]
A. It is not my concern
B. How dare you think so?
C. Why not visit her this weekend?
D. I couldn't agree more.
男性,62岁,患胃溃疡多年,近年来上腹痛发作频繁,无规律,体重减轻,营养不良,胃钡餐透视见有龛影。该病人最需要进行的检查为
A.粪便隐血实验
B.胃酸测定
C.胃镜和细胞学检查
D.腹部B超
E.ERCP