题干
-Can you ______me the answer_____ this question?
-Sorry. It’s too difficult.
A：say; to
B：talk; of
C：tell; to
D：speak; of
答案(点此获取答案解析）
C
-Can you ______me the answer_____ this question?
-Sorry. It’s too difficult.
A：say; to
B：talk; of
C：tell; to
D：speak; of
（1）①→②表示DNA转录（2）共有5种碱基（3）①②中的A表示同一种核苷酸（4）共有4个密码子（5）①→②过程主要在细胞核中进行．