抗代谢物的作用机制为
A. 与代谢必需的酶竞争性结合,抑制酶功能
B. 与DNA、RNA关键部位结合
C. 使细胞膜通透性增加
D. 破坏核酸的复制和转录
E. 抑制DNA聚合酶,阻碍DNA合成
You have just received a letter from the marketing department of Unilever China, informing you of your recruitment. Please write a reply letter to show your appreciation. You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. Do not write the address.
抗疱疹病毒的首选药物是
A. 齐多夫定
B. 金刚烷胺
C. 利巴韦林
D. 沙奎那韦
E. 阿昔洛韦
盐酸甲氧明属于
A. 镇静催眠药
B. 胆碱受体拮抗剂
C. 胆碱受体激动剂
D. 肾上腺素受体拮抗剂
E. 肾上腺素受体激动剂