【简答题】马的染色体数是2n=,以下细胞的染色体数分别是:精原细胞 、初级卵母细胞 、 次级精母细胞 、卵子 。
【判断题】The success of the WTO largely depends on the volume of world trade.
【判断题】高等教育大众化的背景下,当代很多大学生的公共精神已超过公民社会的要求。()
【单选题】According to the conversation, it was ______that made the woman ready to stop traveling.
A.
the unsettledness of travel
B.
the difficulties of trekking
C.
the loneliness of travel
D.
the unfamiliar environment
【单选题】已知某生物的精原细胞的染色体数为2n,则下列对该生物的叙述,错误的是 [ ]
A.
该生物的精原细胞在减数第二次分裂的中期含有n对同源染色体
C.
在减数第一次分裂前期,四分体的个数等于同源染色体的对数
D.
该生物经减数第二次分裂形成的两个子细胞中细胞核的遗传物质不一定相同
【单选题】若一动物的精原细胞有染色体8条,其次级精母细胞在减数第二次分裂后期的染色体、染色单体和DNA分子数分别是 [ ]
【单选题】The World Trade Organization, WTO,
A.
has the power to enforce the rules of international trade.
B.
covers agriculture and physical goods, but not services or intellectual property rights.
C.
recently expelled China for human rights violations.
D.
ruled that NAFTA is to be the model for world trade integration.