问题
单项选择题
关于侵蚀性葡萄胎的诊断哪项正确
A．有葡萄胎清除后不足半年发病史
B．前次妊娠为异位妊娠者
C．能查到卵巢黄素囊肿者
D．光镜下见不到绒毛结构者
E．尿中HCG持续增高
答案
参考答案：A
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关于侵蚀性葡萄胎的诊断哪项正确
A．有葡萄胎清除后不足半年发病史
B．前次妊娠为异位妊娠者
C．能查到卵巢黄素囊肿者
D．光镜下见不到绒毛结构者
E．尿中HCG持续增高
参考答案：A
| 根据对话内容，将方框内符合对话情景的句子抄写在对话的空白处，使对话恢复完整，选项中有两项是多余的。 | |
| A: Hi, Alice! How was your last summer holiday? B: 1__________________ A: Where dicl you go? B: I went to Yinchuan with my parents. A: 2__________________ B: It's one of the most beautiful cities in the northwest of China. I like it very much. A: How long did you stay there? B: We stayed there for five days. 3__________________ A: Which is your favorite place? B: 4 __________________When I was there, I lost myself in the beautiful scenery. A: What interesting things did you do there? B: Lots of things, such as swimming, boating, fishing and riding camels. 5__________________ A: Oh, really, I can't wait to go there. | |
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其导函数在x=0处连续，则λ的取值范围是______．