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【多选题】
配位滴定中,滴定曲线突跃大小与溶液pH的关系为( )A.
pH越小，突跃越小
B.
酸度越大，突跃越大
C.
酸度越小，突跃越大
D.
pH越大，突跃越小
E.
酸度越小，突跃越小
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举一反三
【单选题】—What's your father like? —_____. [ ]
A.
He is funny and smart
B.
He is a skillful worker
C.
He is tall and strong
D.
He looks like a star
【简答题】简述使用食品添加剂应该遵循的原则？
【简答题】句型转换。 1. He saw some smart seals. (改为否定句) He______ ______ ______smart seals. 2. They didn't have a great time on their day off. (同义句转换) They ______ ______ ______ on their day off. 3. What is the weat...
【简答题】给下列的单词选择正确的汉意。 ( ) 1. seat ( ) 2. thirty-eight ( ) 3. story-book ( ) 4. her ( ) 5. Chinese ( ) 6. kitchen ( ) 7. classmate ( ) 8. spoon ( ) 9. member ( ) 10. pa...
【单选题】Everyone who heard Mr. Green's story it. [ ]
A.
laughed at
B.
was laughed
C.
laughed
D.
was laughed at
【简答题】简述使用食品添加剂应遵循的原则。
【简答题】At the beginning of the story ( Green Banana) , the author told his experiences in_______.
【简答题】请简述《食品安全国家标准 食品添加剂使用标准》（GB2760-2014）中对食品添加剂的带入原则？
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