选择相对应的答句

____What's your father's job?                                     A. Eleven.

____Who are they?                                                        B. They are my parents.

____How many people are there in your family?          C. He's a doctor.

____Who's this woman?                                                D. Yes, he is.

____Is this your uncle?                                                   E. She's my aunt.

要使目的基因与对应的载体重组，所需的两种酶是
①限制性内切酶 ②DNA连接酶 ③解旋酶 ④还原酶

从____面看到的图形是 。