有关下图的叙述,正确的是() A.①②中的A表示同一种核苷酸 B.①→②过程主要在细 发布时间:2019-03-02 14:46 │ 来源:www.tikuol.com 题型:单项选择题 问题: 有关下图的叙述,正确的是()A.①②中的A表示同一种核苷酸B.①→②过程主要在细胞核中进行C.DNA双链中①链为编码链D.②上共有6个密码子
题型:单项选择题 根据句意,用括号中所给词的适当形式填空。并将答案写在答题卷相应位置上。小题1:He always makes me ________ when I am sad. (laugh)小题2:Some from the USA went to visit Yunnan History Museum. (tour)小题3:The sea is big on the earth , but the sky is than the sea.(big)小题4:Maybe I can’t go swimming with you. I have a . I have to see a dentist. (tooth)小题5:The number of the students in our school 3000 this year. (be) 查看答案