高等继续教育 / 护理英语II
正确率：100%
题型描述: 单选题
Which part of the digestive tract works for protecting against acid?
A.The surface of the mucous.
B.The muscular tract.
C.The mucous layer.
D.The mucous.
Which part of the digestive tract works for protecting against acid?
A.The surface of the mucous.
B.The muscular tract.
C.The mucous layer.
D.The mucous.
参考答案：
佳题速递：