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【单选题】
提取苷次生苷，原料药首先需要A.
用0.02～0.05mol／L盐酸处理
B.
用0.02～0.05mol／L 氢氧化钠处理
C.
50℃～60℃干燥
D.
30℃～40℃加水保温放置
E.
50℃以上热水浸泡
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反馈参考答案：
举一反三
【单选题】根据国际噪音协会的建议,ICU噪音控制不正确的是
A.
白天控制在45分贝
B.
傍晚控制在40分贝
C.
夜晚控制在20分贝
D.
白天控制在60分贝
E.
墙壁和天花板尽量采用高吸音的建筑材料
【简答题】从中华人民共和国成立到( )基本完成,是我国从新民主主义到( )的过渡时期。
【判断题】Lion tamer Sergei Ivanov was seriously injured by his lion, Sheba, during last night's performance of the Moscow circus. Ivanov has worked in the circus for over 25 years. He was taken to Springfields...
A.
正确
B.
错误
【简答题】完形填空。 Tony is four years old. His (1) name is Brown. (2) father and mother (3) doctors .They are very busy and Tony is (4) home alone . Tony likes drawing very much. He often draws dogs, cocks, foxes ...
【简答题】I . 根据下列各句句意及所给单词的汉语提示 , 写出所缺单词的正确形式 1. I dropped my________( 香烟 ) on the floor and put my foot on it. 2. He spent his________( 青春期的 ) years playing guitar in the church band. 3. Don't be too________(...
【简答题】Cloze 2 The American Dream used to go something like this: arrive in this country for an unskilled job with small pay. Save and (l)______ until you can open a small business--in (2)________ years, a t...
【简答题】A good way to ________ (扩大) your vocabulary is to read a daily newspaper. 2. Smoking during pregnancy ________ (危及) the baby’s life. 3. I was ________ (着迷) by the way she smiled. 4. A few dedicated do...
【简答题】Passage 2 Directions: Listen to a short passage three times. When the passage is read for the first time, listen for its general idea. When the passage is read for the second time, fill in the blanks ...
【单选题】从中华人民共和国成立到社会主义改造基本完成 ,是我国的( )
A.
新民主主义革命时期
B.
国民经济发展时期
C.
从新民主主义向社会主义过渡时期
D.
全面建设社会主义时期
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