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【单选题】
采用非水溶液滴定法测定盐酸麻黄碱含量,加入醋酸汞的目的是( )A.
消除伪麻黄碱的干扰
B.
消除氢卤酸干扰
C.
消除氮原子干扰
D.
消除高氯酸干扰
E.
消除汞盐干扰
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Excel编辑栏中的“×”表示( )。A. 公式栏中的编辑有效,且接收 B. 公式栏中的编辑无效,不接收 C. 不允许接收数学公式 D. 无意义
【单选题】be in line for sth.
A.
develop sth. new, esp. a strong relationship with other people, groups or countries
B.
the conditions that affect what happens or how st. reacts in a particular situation
C.
be likely to get sth.
D.
a good and acceptable reason for doing sth.
【单选题】build [sth.] up
A.
increase [sth.] slowly
B.
praise [sth.] highly
C.
strengthen [sth.]
【简答题】We shoulde________ the thought of health first in schools physical education. (build, construct)
【单选题】听力原文：W: Robert, this bicycle would be good for racing and it isn't very expensive. M: Yes, but my daughter needs a lighter bike to use when she goes to school. What does Robert's daughter do?
A.
A painter.
B.
An athlete.
C.
A student.
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