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【简答题】
阅读下列材料,然后根据材料回答所提问题。 Most of middle school students always wear school uniforms when they are at school, but they also want to make themselves look fashionable and nice. They can't make money now. Is it necessary for them to wear labels (品牌)? Some students show us their own opinions. Bill: I get new clothes and shoes quite often. My parents buy them for me. I buy things because I like them. I get angry if I don't get what I want. I think it's important to wear labels. My favorite lable is Nike because it's the best maker I think. Kate: My mum buys me clothes and shoes. On birthdays I buy my own. I always go for labels because they make me look in fashion. But I don't think it's important to wear labels. I buy things because I like them, not because of the price or the label. Paul: My mother buys me clothes. I don't think labels are important. But my favorite label is Adidas. And I sometimes can't get the things I want because my mother can't afford them. I just wait until she has enough money. 1. What do most of students wear at school? ____________________________________________. 2. Who buys new clothes and shoes for Bill? ____________________________________________. 3. When does Kate can buy her own clothes? ____________________________________________. 4. Is Nike Paul's favorite label? ____________________________________________. 5. What will Paul do if his mother can't afford the things? ____________________________________________.
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【单选题】实验室用标准盐酸溶液测定某NaOH溶液的浓度,用甲基橙作指示剂,下列操作中可能使测定结果偏低的是
A.
酸式滴定管在装液前未用标准酸溶液润洗2~3次
B.
开始实验时酸式滴定管尖嘴部分有气泡,在滴定过程中气泡消失
C.
滴定前平视读数,滴定后俯视读数
D.
盛NaOH溶液的锥形瓶滴定前用NaOH溶液润洗2~3次
【简答题】简述正确使用心理测验的操作要求
【简答题】牛乳酸度的测定中使用的酸碱指示剂是 。
【单选题】试带法测定酸碱度,错误的是
A.
采用酸碱指示剂法
B.
PH试剂块含有甲基红
C.
pH试剂块含有溴麝香草酚蓝
D.
颜色反应由橙红经黄绿到蓝色变化
E.
标本放置过久使结果呈现假阴性
【单选题】食醋总酸度的测定所使用的指示剂通常是( )
A.
甲基橙
B.
溴酚蓝
C.
甲基黄
D.
酚酞
【判断题】《诗经》中的作品最初主要用于典礼、讽谏和娱乐,是周代礼乐文化的重要组成部分。
A.
正确
B.
错误
【简答题】用滴定法测定水中的总酸度使用的指示剂是       。
【单选题】实验室用标准盐酸测定NaOH溶液的浓度,用甲基橙作指示剂,下列操作中可能使测定结果偏低的是(  )
A.
酸式滴定管在装酸液前未用标准盐酸溶液润洗2~3次
B.
开始实验时酸式滴定管尖嘴部分有气泡,在滴定过程中气泡消失
C.
锥形瓶内溶液颜色由黄色变橙色,立即记下滴定管内液面所在刻度
D.
盛NaOH溶液的锥形瓶滴定前用NaOH溶液润洗2~3次
【简答题】用滴定法测定水中的总酸度和总碱度分别使用的指示剂是 和 。
【简答题】滴定法测定水中的总酸度使用的指示剂是       。
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