TCRa链基因重排发生在()
A.V-D-J
B.V-D-J-C
C.V-J-C
D.V-J
E.V-J-D-C
参考答案:D
He finally refused to ________ his plan of travelling the world.
A.give off
B.give up
C.give to
D.give in
D-SCDMA系统是TDD模式,一条物理信道由频率、()、码道的组合来标志。