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【单选题】
对缓冲溶液的定义理解错误的是A.
具有缓冲作用的溶液称为缓冲溶液
B.
其起到的作用称为缓冲作用，换言之为不易引起溶液pH改变的作用
C.
能够对抗外来的大量强酸以及强碱
D.
要使缓冲液有缓冲作用，缓冲溶液必须同时含有足量的能够对抗外来强酸的组分
E.
缓冲溶液虽然能够对抗外来强酸强碱，但是少量的
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【简答题】I. Translate the following sentences into Chinese. 1. The matter is receiving the seriousconsideration of the school. 2. My recognition of him was immediate. 3. The pianist gave a fine performance. 4....
【判断题】竞争是具有积极意义的,它有助于激发竞争主体的进取心,有助于竞争主体客观地评价自我、扬长避短、展现才华、不断提高,从而有助于推动社会的发展,所以竞争时要不择手段。( )
A.
正确
B.
错误
【单选题】The work _______ and the teacher gave a big smile.
A.
is well done
B.
was well done
C.
will be well done
D.
have been well done
【简答题】Please judge which of the five basic structures the following sentences belong to. (请判断以下句子属于哪一种基本结构:主谓;主谓宾;主系表;主谓双宾;主谓宾宾补) 第一组 1. I am happy . 2.She likes English. 3. The teacher came . 4. That made...
【简答题】根据汉语提示完成单词。 1. The man gave a lot of money to a medical _______ (研究)． 2. He _______(栓) his horse to a tree by the road just now. 3. People get _______ (紧张) when they go to work the first time. 4. Our ...
相关题目：
【判断题】竞争是具有积极意义的,它有助于激发竞争主体的进取心,有助于竞争主体客观地评价自我、扬长避短、展现才华、不断提高,从而有助于推动社会的发展,所以竞争时要不择手段。( )
A.
正确
B.
错误