单项选择题

COPD的常见病因不包括（）

A.空气污染
B.病毒感染
C.遗传因素
D.细菌感染
E.吸烟

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单项选择题

There was a famous calligrapher honored as the "Great Master Calligrapher" in the Jin Dynasty who had written the Preface to the Orchid Pavilion Collection. What was his name?
A、Ou Yangxiu
B、Zhang Xu
C、Wang Xianzhi
D、Wang Xizhi

动画创作需要创新思维，所以我们可以采用多元化的表现形式、个性化的角色造型和不同的主题来进行动画创作。

答案：正确