皮皮学，免费搜题
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搜题
【单选题】
在总游离皂苷的乙醚液中,用5c/oNa2CO3水溶液可萃取到A.
带一个α-酚羟基的蒽醌
B.
带一个β-酚羟基的蒽醌
C.
带两个α-酚羟基的蒽醌
D.
不带酚羟基的蒽醌
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】He slipped back in time, as he did so easily nowadays. (Para. 9)
A.
He had recently got into the habit of recalling things in the past/of reminiscing/of letting his thoughts go back to the old days.
B.
He went back to the old days just like what he did now.
C.
He went back to the old days because he often did so nowadays.
【简答题】Now that he was old he slipped back easily __________ time.
【单选题】当事人对药品检验机构的检验结果有异议的，可以自收到药品检验结果之日起向原药品检验机构或者上一级药品监督管理部门申请复验的时间是
A.
三日内
B.
五日内
C.
七日内
D.
十日内
E.
十五日内
【简答题】制动器是如何分类的？
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