单项选择题
疯牛病的致病物质是()A.α-螺旋朊蛋白B.β-折叠朊蛋白C.变性的朊蛋白D.β-转角朊蛋白E.无规卷曲朊蛋白
单项选择题疯牛病的致病物质是()
该图为音像制品条码 7-900016-365-4 是()A.前缀码B.ISBNC.序号D.出版者
多项选择题该图为音像制品条码 7-900016-365-4 是()
A swarm of people the car to see the famous actress in ...
多项选择题A swarm of people the car to see the famous actress in it.