题干
当你想看别人的玩具熊时，说：
A：Have a look my bear.
B：Look!
C：Let's look my bear.
D：May I have a look at your bear?
答案(点此获取答案解析）
D
当你想看别人的玩具熊时，说：
A：Have a look my bear.
B：Look!
C：Let's look my bear.
D：May I have a look at your bear?
链DNA分子的叙述不正确的是