[名词解释] 构象

蛋白质的三级结构 英国政党报刊主要特点是（） ["A.政党色彩","B.论战气味","C.党同伐异","D.利润丰厚"] 蛋白质的二级结构 都铎王朝对新闻出版采取的措施包括（） ["许可制","检查制","惩处制","课税制"] 烤烟叶片片完整度低于（）% ["A、20","B、30","C、40","D、50"] 构象