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【简答题】
曾经认为DNA的复制是全保留复制，每个双螺旋分子都作为新的子代双螺旋分子的模板。如果这样，在Meselson和Stahl的实验中他们将得到什么结果?
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举一反三
【单选题】Almost all recognize that non-scientists as well as laymen are interested in sciences, yet scientists have been trying to classify only those who are involved in ______ scientific practices as genuine...
A.
authentic... articulating
B.
rigorous ... unconvinced of
C.
specialized ... sympathetic to
D.
broad ... certain of
E.
democratic ... rejecting
【单选题】What does Chasin say about the project?
A.
It just focused on the sufferings of black females.
B.
It helped expand the influence of graffiti art.
C.
It has started the career of many creative artists.
D.
It has created some meaningful artistic works.
【单选题】What does Karraker think is also important?
A.
Reducing marital stress on wives.
B.
Stabilizing old couples' relations.
C.
Providing extra care for divorced women.
D.
Making men pay for their wives, health costs.
【单选题】Scientists also have no idea how long it will be before all wild animals in the cages _____.
A.
should be set free
B.
will be set free
C.
are set free
D.
would be set free
【单选题】下述程序的运行结果是( )。 Private Sub Form_Click() j = 0 Do While j < 30 j=(j + 1) * (j + 2) k=k + 1 Loop Print k; j End Sub
A.
0 1
B.
3 182
C.
30 30
D.
4 30
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