在分子组成上,染色体和染色质的区别是()
A.有无组蛋白
B.非组蛋白的种类不同
C.是否有稀有碱基
D.碱基数量不同
E.没有区别
参考答案:E
证券市场上最活跃的投资者是()。
A.证券经营机构
B.金融机构
C.各类基金
D.企业和事业法人
I celebrate myself, and sing myself, And what I assume you shall assume, For every atom belonging to me as good belongs to you. Questions: A. Identify the author and the work. B. What are the two principal beliefs that the poet sets forth in this poem