如何复诵空管进近中减速的指令:C: CSN6605 reduce speed to 220kts, runway 18R, report establishedP: _________, _______, _________ CSN6605
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如何复诵进近管制移交的指令:CTL:AFR 586 cleared ILS approach runway 23L, continue approach,you are number one, contact Tower on 124.3.P: ____________, ___________ ,__________, __________AFR 586.
3.参与转录的酶是( )
A. 依赖DNA的RNA聚合酶
B. 依赖DNA的DNA聚合酶
C. 依赖RNA的DNA聚合酶
D. 依赖RNA的RNA聚合酶
DNA上某段碱基顺序为5’-ACTAGTCAG-3’,转录后相应的碱基顺序为( )
A.5’-TGATCAGTC-3’
B.5’-UGAUCAGUC-3’
C.5’-CUGACUAGU-3’
D.5’-CTGACTAGT-3’
8.遗传密码共有( )
A. 3种
B.20种
C.61种
D.64种