下列哪种碱基排列顺序肯定不是遗传密码 [ ]
A.UUU
B.AAA
C.GUC
D.GAT
答案:D
— Do you want to eat something?
— , thanks. I am feeling sick now. I don't feel like . [ ]
A. Yes, eating something
B. No, to eat anything
C. Yes, to eat anything
D. No, eating anything
柴油锤在施工中造成的()问题较为突出。
A.振动
B.噪声
C.污染
D.公害