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问题 单项选择题 A1/A2型题

肾细胞癌MRI增强扫描时的强化特点是（）

A.延迟期强化常不及肾实质

B.可为不规则边缘强化

C.可为不均匀斑片状强化

D.少数可无明显对比增强

E.以上均是

答案

参考答案：E

解析：肾癌增强早期，肿瘤多有明显、不均一强化，其后呈相对信号不均一的肿块。

单项选择题

Questions 16 to 20 are based on the following talk.

A. They get sudden attacks of sleep any time any place.
B. They are mostly students enrolled in 8 A.M. classes.
C. They are not easily cured if narcolepsy is diagnosed.
D. They often sit at a table and their faces fall into a soup.
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单项选择题

开展社区口腔保健应首先

A．口腔健康咨询
B．捷径调查
C．问卷调查
D．制定口腔保健计划
E．口腔预防保健措施
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