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少先队对大队辅导员的配臵有何要求？

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样品在无色火焰中燃烧，火焰显紫色

A. 青霉素钾
B. 硫酸阿托品
C. 醋酸氟氢松
D. 苯巴比妥钠
E. 甘油

Rapping could be described as speaking or singing words______.

A. at a slow speed over music with quick beats
B. at a fast speed over music with slow beats
C. at a fast speed over music with quick beats
D. at a slow speed over music with slow beats

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非水溶液滴定法测定硝酸士的宁含量

A. 电位法指示终点
B. 永停法指示终点
C. 加溴化汞处理
D. 加醋酸汞处理
E. 加氯化汞处理

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England and Scotland are separated by

A. the Thames River.
B. the Clyde River.
C. the Lake Neagh.
D. the Hadrian"s Wall.

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