卡莫氟是氟尿嘧啶的前体药物，对结肠癌和直肠癌的治疗效果好
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阿糖胞苷是非急性淋巴细胞性白血病的首选药物
A. 对
B. 错
Question 1
A. To show they are very happy to welcome a new year.
B. To scare evil spirits away from the new year.
C. To make people feel excited.
D. To make the criminals feel frightened.
Question 2
A. Giving girgs to each other.
B. Writing letters to friends.
C. Lighting firecrackers.
D. Visiting relatives.
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