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【单选题】
蛋白质所形成的胶体颗粒,在下列哪种条件下不稳定( )A.
溶液pH大于pI
B.
溶液pH小于pI
C.
溶液pH等于pI
D.
溶液pH等于7.4
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【简答题】完形填空。 This is my 1 picture. My grandfather and grandmother 2 old. My father is 3 English teacher. He is 4 . My mother is a worker. 5 are students. We are in NO.2 Middle School. We 6 in the same grade....
【简答题】I am a person who can get angry easily. But since I read an article 1 by my English teacher, things have changed a lot. I’m 2 at a boarding (寄宿的) school. So I 3 learn not only how to study well, but a...
【单选题】My English teacher is really ___．She is often seen working in her office far into the night．
A.
warm-hearted
B.
easy-going
C.
hard-working
D.
self-confident
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