早期蛔虫性肠梗阻属于（）。
A.机械性绞窄性肠梗阻
B.机械性单纯性肠梗阻
C.麻痹性肠梗阻
D.痉挛性肠梗阻
E.血运性肠梗阻
参考答案：B
We bought _____ a present, but _____ didn't like it. [ ]
A. they ; them
B. them; they
C. themselves; their
D. theirs; they
卵巢癌USG声像图表现为（）
A.盆腹腔内较大肿块，可为双侧性
B.肿块形态不规则，边界不清
C.肿块回声杂乱
D.分隔形成的带状回声厚薄不均
E.可发现肿瘤的腹膜种植及肝转移等异常
