对祖国统一,民族平等、民族团结和地区发展具有重大意义的我国一项基本国策和基本政治制度是 [ ]
A.政治协商会议
B.人民代表大会
C.计划生育政策
D.民族区域自治
答案:D
Then over dinner,Franklin mentions that he well since he gave up smoking and Dr Candy,the local doctor,offers to write him a prescription for some medicine.
A.had not been sleeping
B.has not been sleeping
C.is not sleeping
D.was not sleeping
种群的基本特征包括种群的()特征。
A.空间分布
B.数量
C.遗传
D.质量