题目内容

That’s a cat. _____ name is Mimi.

A. It
B. It's
C. Its
D. he

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This is a photo of _family. May I have one of __?

A. yours; my
B. my; yours
C. your; my
D. yours; mine

These are my books. Where are ________?

A. their
B. your
C. theirs
D. mine

Don't you let ____ help you ?

A. I and my friend
B. my friend and I
C. my friend and me
D. my friend and I to

利用中断杂交技术作连锁图,已知A、B、C基因转入受体菌的时间分别为6分钟、11分钟和5分钟,请问在Hfr菌株中这三个基因的顺序如何?

A. Origin-A-B-C
B. Origin-C-A-B
C. Origin-C-B-A
D. Origin-A-C-B