核酸对紫外线的最大吸收在哪一波长附近 A.260nm B.320nm C.220 发布时间:2017-04-21 00:07 │ 来源:www.tikuol.com 题型:单项选择题 问题: 核酸对紫外线的最大吸收在哪一波长附近A.260nm B.320nm C.220nm D.280nm E.190nm
题型:单项选择题 CONVERSATION 1 (Questions 1-4) The man likes the college’s (1) and (2) . Number of the students: (3) . The students can join in different (4) . 查看答案