设f’(1)=1,则=()。
参考答案:
It was April 29,2011 _______ prince William and Kate Middleton walked into the palace hall
of the wedding ceremony.[ ]
A. that
B. when
C. since
D. before
反密码子UAG识别的mRNA上的密码子是
A.GTC
B.ATC
C.AUC
D.CTA
E.CUA