胃窦部黏膜重度不典型性增生是（）。
A.癌前病变
B.交界性肿瘤
C.癌内瘤
D.原位癌
E.非肿瘤性病变
参考答案：A
解析：考核癌前病变的概念。癌前病变是指有明显癌变危险的痛变，如不及时处理有可能转变为癌。这些病变包括黏膜白斑、子宫颈非典型性增生、大肠腺瘤和胃黏膜非典型性增生等。胃黏膜非典型性增生与胃癌关系密切，在萎缩性胃炎患者中更常见。所以，正确答案为A。
Do you remember your home phone number or family birthday? The researchers（调查者）spent two weeks polling（调查）4,000 people for the magazine named Brain Trainer. Here are the results of the survey.
The survey took the researchers about half a 小题1:_________. From the survey, we know lots of people 小题2:_ ________ remember their home phone numbers or 小题3:_________ because they always use their 小题4:_________ to remember them. Most people rely on electronic tools instead of 小题5:_______ important dates themselves. Without electronic tools, can you imagine what your life will be like? |