慢性萎缩性胃炎的主要病因是
A．由慢性萎缩性胃炎发展而来
B．与长期饮酒有关
C．与胆汁反流有关
D．与自身免疫有关
E．与长期吸烟有关
参考答案：D
颈动脉腺是一个压力感受器，用以监测动脉的血压。（）
I found him sitting in his chair，completely ____ a magazine．
A．absorbing
B．being absorbed in
C．absorbed in
D．absorbing in
