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【单选题】
用法分解有机物后，以稀HNO 3 酸化并煮沸5分钟，加入AgNO 3 溶液，有淡黄色沉淀出现，则说明该有机物含（）元素。A.
S
B.
X（卤素）
C.
N
D.
C
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【单选题】给Excel 2003工作表改名的正确操作是()
A.
右击工作表标签条中某个工作表名，从弹出菜单中选'重命名'
B.
单击工作表标签条中某个工作表名，从弹出菜单中选'插入'
C.
右击工作表标签条中某个工作表名，从弹出菜单中选'插入'
D.
单击工作表标签条中的某个工作表名，从弹出菜单中选'重命名'
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【简答题】It was the last day of the final examination in a large eastern university. On the steps of one building, a group of engineering students were talking about the exam that was going to begin in a few 3...
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