蛋白质变性是由于()
A. 蛋白质一级结构改变
B. 蛋白质空间构象的改变
C. 辅基的脱落
D. 蛋白质水解
E. 其他都不是
巴比妥缓冲液（pH 8.6）为（）性（填酸或碱），多数血清蛋白在巴比妥缓冲中以（）离子形式存在（填正或负）。
Among the classification of Gagne’s learning results, ( ) refers to the contents of learners to mediate their inner attention, memory and thinking.
A. verbal information
B. cognitive strategy
C. intelligence skill
D. operant skill
( ) state, we can call it “learning”.
A. When Mr. Li enters a dark room, his vision enhances significantly.
B. Xiao Ming becomes irritable after drunk.
C. Xiao Zhang won the game after he took the stimulant.
D. Monkey simulates the travelers to eat cookies.
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