根据录音，选择合适的答案（） 查看材料
A. To please his father who was sick．
B. To make money for his father．
C. To help the American Liver Foundation．
D. To stay free of liver disease．
Travis Hill can cut off a year from the training which would take as long as a decadeof his life due to a new program at NYU School of Medicine.
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DNA组成成分()。
A. 葡萄糖
B. 核糖
C. 脱氧核糖
D. 糖原
E. 糖脂
根据录音，选择合适的答案（） 查看材料
A. It is very boring．
B. It is very difficult．
C. It is very special．
D. It is very wonderful．
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