21.Which method can be used to produce the cloned sheep, Dolly?
(A) Embryonic stem cell
transplantation;
(B) Polymerase chain reaction;
(C) Short tandem repeats;
(D) Somatic cell
nuclear transfer.
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統計: A(1), B(0), C(0), D(13), E(0) #3325427
統計: A(1), B(0), C(0), D(13), E(0) #3325427