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【单选题】
Which of the following is not true about CRISPR/Cas9 system ?A.
The system contains a gRNA and an exo nuclease
B.
CRISPR refers to c lustered regularly interspaced short palindromic repeat
C.
A gRNA guides the endonuclease to load on a DNA target and cut it
D.
It is a part of immunity system of bacterium used to resist the foreign DNA
E.
The system contains a gRNA and an endonuclease
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【单选题】— I have made a decision to spend my holiday at the beach. — _____ I'm sure you'll have a good time. [ ]
A.
Really?
B.
Sounds wonderful.
C.
Let me see.
D.
Well done!
【单选题】I hope you'll have a good holiday.
A.
congratulations
B.
i travelled abroad last week.
C.
Thank you very much
【简答题】He fought bravely in many battles and g______( 赢得 ) their respect.
【单选题】-I hope you'll have a good journey. - .
A.
Well done .
B.
Don't mention it.
C.
Certainly.
D.
Thank you very much !
【简答题】What is Jenny doing?
【单选题】What is Jenny going to do?
A.
Have lunch with Jim.
B.
Help Jim clean the house.
C.
Look after her baby.
D.
Prepare lunch for Jim.
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