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【单选题】
用 KMnO 4 标准溶液测定 H 2 O 2 时,滴定至粉红色为终点。滴定完成后 5分钟发现溶液粉红色消失,其原因是 ( )A.
H 2 O 2 未反应完全
B.
实验室还原性气体使之褪色
C.
KMnO 4 部分生成了 MnO 2
D.
KMnO 4 标准溶液浓度 太 稀
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【单选题】'We owe different duties to different qualities' suggests______ is the duty paired with the quality of integrity.
A.
dignity
B.
trust
C.
affection
D.
obedience
【多选题】下列关于会计的对象的表述正确的是( )。
A.
会计的对象是指会计核算和监督的内容
B.
凡是特定单位能够以货币表现的经济运动都是会计的对象
C.
企业会计的对象就是企业的资金运动
D.
企业的资金运动，表现为资金投入、资金运用和资金退出三个过程
【简答题】根据句意及首字母提示完成单词。 1. The film is about the Long M______? Have you ever seen it? 2. I'm going to fly there. Would you buy two a______ tickets for me? 3. Let's buy some pens and pencils at the s______ sho...
【单选题】We owe our thanks to Einstein for three of the following except______.
A.
light
B.
electricity and atom
C.
motion and gravity
D.
space and time
【简答题】根据图片提示，选择正确的单词完成句子。 1. Look, I have a _____________. [ ] A. plane B. car C. balloon 2. This is my _____________. [ ] A. monkey B. mouth C. mouse 3. Can I have some _____________? Sure. [ ...
【简答题】用所给单词的适当形式完成句子。 1. Our family had a _____ (please) weekend together with Mr Black. 2. The soup is so_____ (salt) that I can't stand it. 3. The _____ (mix) tastes delicious. Would you like some? 4. ...
【简答题】______(多亏了)her assistance ,we succeeded in starting the engine. (owe)
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