【单选题】When the team he supports wins the World Cup, Detleb feels a surge of joy, which turns into a feeling of satisfaction that lasts for days. What is one of the reasons that the feeling of satisfaction m...
A.
It is a very strong feeling
B.
It is brought about by a specific event.
C.
It has a lengthy duration.
D.
It is a positive feeling.
E.
It is not the result of something that Detleb himself has done.
【单选题】The figure below shows a partial chromosome map of an E. coli Hfr strain. Each mark equals 10 minutes. If transfer of genes begins at “*” and goes in the direction of the arrow, what is one of the pre...
A.
ton and lac will rarely be transferred together.
B.
lac and azi will rarely be transferred together.
C.
Ten minutes after transfer of ton , azi will be transferred.
D.
It would take 30 minutes to transfer all of the genes that are shown.