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【单选题】
阿司匹林加碳酸钠试液加热后,再加稀硫酸酸化,此时产生的白色沉淀应是( )A.
苯酚
B.
乙酰水杨酸
C.
水杨酸
D.
醋酸钠
E.
乙酰水杨酰
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反馈参考答案：
举一反三
【判断题】All the original main buildings in Shaolin Temple are intact throughout the history. ( )
A.
正确
B.
错误
【单选题】You are using recovery Manager (RMAN) with a recovery catalog to backup up your production database. The backups and the archived redo log files are copied to a tape drive on a daily basis. The databa...
A.
Open the database in NORMAL mode
B.
Open the database in read-only mode
C.
Open the database in RESTRICTED mode
D.
Open the database with the RESETLOGS option
【判断题】Pre-flight, flight attendants will check Water fire extinguisher's the safety wire and seal on the handle are intact.
A.
正确
B.
错误
【单选题】根据下列代码,选出正确的定位层级顺序(由里至外):
A.
box1 < box2 < box3
B.
box1 < box3 < box2
C.
box3 < box1 < box2
D.
box3 < box2 < box1
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