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【单选题】
下面哪一个叙述是不正确的（）A.
抗生素是来源于细菌，霉菌或其它微生物通过发酵产生的二次代谢产物
B.
抗生素在很低的浓度下能抑制或杀灭各种病原菌，达到治疗的目的
C.
除了抗感染以外，某些抗生素还有抗肿瘤作用
D.
结构简单的抗生素可以用法制得，如氯霉素。
E.
异烟肼是抗结核杆菌的抗生素
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举一反三
【单选题】The new station being built for the next Asian Games will be ________ the present one.
A.
as three times big as
B.
three times as big as
C.
as big as three times
D.
as big three times as
【简答题】如果一个企业有良好的投资项目,此时企业应采取______________股利分配政策。
【单选题】The new stadium being built for the next Asian Games will be ______ the present one.
A.
three times as big as
B.
as three times big as
C.
as big as three times
D.
as big three times as