第19题: [单项选择]下列病变与子宫肌瘤超声表现鉴别诊断最困难的是()。 A. 子宫内膜增生 B. 黄体囊肿 C. 盆腔炎性包块 D. 子宫腺肌病 E. 卵巢成熟型畸胎瘤 参考答案:D 答案解析:子宫腺肌病即子宫肌层内子宫内膜异位症,声像图表现为子宫多呈均匀性增大,边缘轮廓规则,宫腔内膜回声无变化,子宫切面内回声强弱不均匀,但子宫腺肌瘤与子宫肌瘤往往较难鉴别。
Sellers offer ______ only to buyers who are first willing to jump a hurdle of some sort. 参考答案:discounts 答案解析:[解析] 从听力材料中我们了解到“…sellers offer discounts,but only to buyers who are first willing to jump a hurdle