鱼类的尿液是透明无色或黄色的液体,肉食性鱼类的尿多呈() A.碱性 B.酸性 C.中 发布时间:2018-11-22 06:50 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 鱼类的尿液是透明无色或黄色的液体,肉食性鱼类的尿多呈()A.碱性B.酸性C.中性D.不一定
题型:单项选择题 A1型题 —Where are the books?—They are ______.[ ]A. in the shelf B. to the shelfC. on the shelf 查看答案
题型:单项选择题 A1型题 People usually work hard ____ the day, and they have a good rest ____ night.[ ]A. at; at B. on; in C. on; at D. during; at 查看答案