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【多选题】
有一碱液,其中可能只含NaOH、NaHCO3、Na2CO3,也可能含NaOH和Na2CO3或NaHCO3和Na2CO3。现取一定量试样,加水适量后加酚酞指示剂。用HCl标准溶液滴定至酚酞变色时,消耗HCl标准溶液V1mL,再加入甲基橙指示剂,继续用同浓度的HCl标准溶液滴定至甲基橙变色为终点,又消耗HCl标准溶液V2mL,当此碱液是混合物时,V1和V2的关系为()。A.
V1>0,V2=0
B.
V1=0,V2>0
C.
V1>V2
D.
V1
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皮皮学刷刷变学霸
举一反三
【单选题】When you are having a cold，__________. 查看材料
A.
it is always the same kind of cold that you had last time
B.
it may be the same kind of cold that you had last time
C.
it is certainly not the same kind of cold that you had last time
D.
it is probably not the same kind of cold that you had last time
【判断题】The Turkish crisis was accentuated by the internal political hassles between the prime minister and the president regarding reforms.
A.
正确
B.
错误
【判断题】Is the following statement regarding the assurance provided by an internal control system true or false? An effective internal control system provides the auditor with absolute assurance that control ...
A.
正确
B.
错误
【判断题】Is the following statement regarding internal control questionnaires true or false?Internal control questionnaires are used to determine whether there are controls which prevent or detect specified er...
A.
正确
B.
错误
【多选题】) 9 、下列关于世界古代旅行游览发展的说法正确的有 _______ 。 A .首先在文明古国中兴起 B .最早的旅行者目的在于宗教朝圣 C .意大利人马可.波罗是第一个走完丝绸之路全程的人 D .古代旅行游览与近代旅游的分界线在 1841 年
A.
1
B.
2
C.
3
D.
4
【判断题】Is the following statement regarding the assurance provided by an internal control system true or false?An effective internal control system provides the auditor with absolute assurance that control o...
A.
正确
B.
错误
【简答题】People have it when catching a cold.
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