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【单选题】
疯牛病的发病机制A.
基因错配
B.
基因点突变
C.
蛋白质一级结构改变
D.
蛋白质空间改变
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【简答题】The morning had been a disaster. My tooth was aching, and I’d been in an argument with a friend. Her words still hurt：“The trouble with you is that you won’t put yourself in my place. Can’t you see th...
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【简答题】The morning had been a disaster. My tooth was aching, and I’d been in an argument with a friend. Her words still hurt: “The trouble with you is that you won’t put yourself in my place. Can’t you see t...
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