When is she getting married
A. In spring.
B. In summer.
C. In winter.
胸腺嘧啶分解的终产物是
A. 尿素
B. 尿酸
C. β-氨基异丁酸
D. β-丙氨酸
E. 肌酐
What should the woman do first
A. Put in the money.
B. Put in the soap powder.
C. Put in the washing.
6-巯基嘌呤、8-氮杂鸟嘌呤具有抗肿瘤作用，其可能的机制是
A. 抑制嘌呤的补救合成
B. 碱基错配
C. 抑制DNA聚合酶的活性
D. 抑制蛋白质的合成
E. 其他机制
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