皮皮学，免费搜题
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搜题
【单选题】
睾酮口服无效，结构修饰后稳定性增加，其有效的方法为（）A.
将17β-羟基酯化
B.
将17β-羟基氧化为羰基
C.
引入17α-甲基
D.
将17β-羟基修饰为醚
E.
引入17α-乙炔基
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】You can cut ____________ on the number of ads and still reach more people.
A.
down
B.
up
C.
over
D.
about
【简答题】Requirement:Listen to a 3-minute English speech and interpret it into Chinese. You can cut the speech into 2-3 segments when listening. Upload your recordings, and later on give scores to 3 of your cl...
【简答题】Requirement:Listen to a 3-minute English speech and interpret it into Chinese. You can cut the speech into 2-3 segments when listening. Upload your recordings, and later on give scores to 3 of your cl...
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