题目: When it was his turn to speak, ________ , he stood up. [ ]A. nervously and excited B. nervous and excitedly C. nervously and excitedly D. nervous and excited 答案: 答案:D
题型:选择题 如图若O表示某精子,据图分析,下列叙述不正确的是[ ]A.A细胞内含有两个染色体组和两个四分体B.C细胞含有两个染色体组和两对同源染色体C.D细胞中含有一个染色体组和四个姐妹染色单体D.图中B细胞不属于该精子形成的过程 查看答案