下列不具有鳔的鱼是()。 A.鲨鱼和比目鱼 B.青鱼和带鱼 C.鳊鱼和鲳鱼 D.肺鱼 发布时间:2017-09-12 08:34 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列不具有鳔的鱼是()。A.鲨鱼和比目鱼B.青鱼和带鱼C.鳊鱼和鲳鱼D.肺鱼和鲐鱼
题型:单项选择题 选词填空。an, riding, teaches, to, does, be1. Her mother is a teacher. She ______________ math. 2. I'm going to ______________ a doctor. 3. Is your aunt ______________ accountant? Yes, she is.4. My brother likes ______________ a bike. 5. ______________ he like collecting stamps? Yes, he does. 6. My mother goes ______________ work by bus. 查看答案
题型:单项选择题 有关ATP合成机制的叙述正确的是()A.除α、β亚基外,其他亚基有ATP结合部位B.在ATP合酶F1部分进行C.F0部分仅起固定F1部分作用D.F1α、β亚基构成质子通道E.H自由透过线粒体内膜 查看答案