问题
单项选择题 A1/A2型题
阿糖胞苷的抗恶性肿瘤的作用机制是（）
A.二氢叶酸还原酶抑制剂
B.胸苷酸合成酶抑制剂
C.嘌呤核苷酸互变抑制剂
D.核苷酸还原酶抑制剂
E.DNA多聚酶抑制剂
答案
参考答案：E
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阿糖胞苷的抗恶性肿瘤的作用机制是（）
A.二氢叶酸还原酶抑制剂
B.胸苷酸合成酶抑制剂
C.嘌呤核苷酸互变抑制剂
D.核苷酸还原酶抑制剂
E.DNA多聚酶抑制剂
参考答案：E
| 根据上下文填空，将正确答案序号填在前面括号里。 |
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