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【单选题】
1928年，弗莱明发现了青霉素。经过从动物实验到人体的长期反复试验过程，1942年，青霉素成为人类战胜病菌的有力武器。但是，青霉素不能治疗结核菌等病菌的感染。之后，人们又发现了金霉素等，形成了抗菌素家族。这表明( )。
A.
新事物在旧事物的基础上产生
B.
新事物发展一帆风顺
C.
新事物在与旧事物的斗争中成长
D.
新事物发展要经历由不完善到完善的过程
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参考答案：
举一反三
【单选题】Interferon For several years, scientists have been testing a substance called interferon (干扰素),a potential wonder drug that is proving to be effective in treating a variety of ailments, including viru...
A.
Right
B.
Wrong
C.
Not Mentioned
【单选题】Interferon For several years, scientists have been testing a substance called interferon (干扰素),a potential wonder drug that is proving to be effective in treating a variety of ailments, including viru...
A.
Right
B.
Wrong
C.
Not Mentioned
【单选题】下列不是低周反复试验的优点的是（）。
A.
设备比较简单，耗资较少
B.
在逐步加载过程中可以停下来仔细观察反复荷载下结构的变形和破坏现象
C.
能做比较大型的结构试验及各种类型的结构试验
D.
能与任一次确定性的非线性地震反应结果相比
相关题目：
【单选题】Interferon For several years, scientists have been testing a substance called interferon (干扰素),a potential wonder drug that is proving to be effective in treating a variety of ailments, including viru...
A.
Right
B.
Wrong
C.
Not Mentioned
【单选题】Interferon For several years, scientists have been testing a substance called interferon (干扰素),a potential wonder drug that is proving to be effective in treating a variety of ailments, including viru...
A.
Right
B.
Wrong
C.
Not Mentioned
【单选题】下列不是低周反复试验的优点的是（）。
A.
设备比较简单，耗资较少
B.
在逐步加载过程中可以停下来仔细观察反复荷载下结构的变形和破坏现象
C.
能做比较大型的结构试验及各种类型的结构试验
D.
能与任一次确定性的非线性地震反应结果相比
参考解析：
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