皮皮学，免费搜题
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【单选题】
分离未知成分的天然药物提取液的方法A.
系统溶剂萃取法
B.
两相溶剂萃取法
C.
沉淀法
D.
结晶法
E.
透析法
F.
分馏法
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】______________ v. to stare angrily and fiercely at sb
【简答题】board estimate figure imagine meaning mysterious mystery object present(v.) pronounce stare weigh Jane had to say goodbye to her friends when it was time to ________________ the train.
【单选题】关干受精卵发育与植入正确的是
A.
精子到达输卵管与卵子相遇，顶体外膜破裂释出顶体酶，称为精子获能
B.
获能的精子穿透初级卵母细胞的透明带，为受精的开始
C.
孕卵植入后蜕膜产生“早孕因子”，抑制母体淋巴细胞活性
D.
妊娠期的子宫内膜称为蜕膜
E.
囊胚与子宫肌层间的蜕膜为真蜕膜
【简答题】v 2.The girl felt uneasy with the whole class _________ (stare) at her.
【简答题】board estimate figure imagine meaning mysterious mystery object present(v.) pronounce stare weigh How life began on Earth is one of the great ________________ science.
【简答题】board estimate figure imagine meaning mysterious mystery object present(v.) pronounce stare weigh Some students find it difficult to ______________________ the word "thorough".
【简答题】board estimate figure imagine meaning mysterious mystery object present(v.) pronounce stare weigh Look, there is a strange __________________ in the sky!
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