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【单选题】
今年春节前后,中国爆发了大规模的新冠肺炎,研究者甲将新冠状病毒的遗传物质彻底水解后得到三种化合物A、B、C,研究者噬菌体的遗传物质彻底水解后得到三种化合物A、B、D,你认为C和D分别是指哪种化合物( )
A.
尿嘧啶和胸腺嘧啶
B.
胸腺嘧啶和尿嘧啶
C.
核糖和脱氧核糖
D.
尿嘧啶和腺嘌呤
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【单选题】Pictures in the British papers this week of Prince William, Prince Charles's 18-year-old son, cleaning toilets overseas, have led to a surge of altruism (利他主义). Raleigh International, the charity that...
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