导致胃体萎缩性胃炎的病因为().
A.自身免疫反应
B.胃黏膜营养因子缺乏
C.长期口服损伤胃黏膜的药物
D.口腔及咽部的慢性病灶
E.胆汁反流
参考答案:D
— Is the watch on the bed?
— _____.
[ ]
A. Yes, it isn't
B. No, it is
C. Yes, it's
D. No, it isn't
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