泪膜的脂质层由() A.泪腺和副泪腺分泌 B.睑板腺、睑缘腺分泌 C.结膜杯状细胞分 发布时间:2018-11-19 11:35 │ 来源:www.tikuol.com 题型:单项选择题 问题: 泪膜的脂质层由()A.泪腺和副泪腺分泌B.睑板腺、睑缘腺分泌C.结膜杯状细胞分泌D.睑板腺和泪腺分泌E.副泪腺和睑缘腺分泌
题型:单项选择题 John has never been to the space museum, ________? [ ]A. does heB. doesn't heC. has he D. hasn't he 查看答案